Read the following passage and questions, then choose the right answer from options, the answer should be one of A, B, C, D.

<passage>:
Hence, publishers who worry about the effect of university OA policies on subscriptions have the remedy in their own hands. Faculty needn’t paternalize publishers by voting down OA policies when publishers can protect themselves whenever they see the need to do so. The experience at Harvard since February 2008 is that very few publishers see the need to do so. Fewer than a handful systematically require waivers from Harvard authors. This chapter, then, focuses on the strongest green OA mandates at funding agencies, like the Wellcome Trust and NIH, which allow no opt-outs for publishers or grantees. Will strong green OA policies of that kind trigger cancellations of toll-access journals? Here are 10 parts of any complete answer. 1. Nobody knows yet how green OA policies will affect journal subscriptions. Rising levels of green OA may trigger toll-access journal cancellations, or they may not. So far they haven’t. 2. The evidence from physics is the most relevant. Physics has the highest levels and longest history of green OA. The evidence from physics to date is that high levels of green OA don’t cause journal cancellations. On the contrary, the relationship between arXiv (the OA repository for physics) and toll-access physics journals is more symbiotic than antagonistic. Physicists have been self-archiving since 1991, far longer than in any other field. In some subfields, such as particle physics, the rate of OA archiving approaches 100 percent, far higher than in any other field. If high-volume green OA caused journal cancellations, we’d see the effect first in physics. But it hasn’t happened. Two leading publishers of physics journals, the American Physical Society (APS) and Institute of Physics (IOP), have publicly acknowledged that they’ve seen no cancellations attributable to OA archiving. In fact, the APS and IOP have not only made peace with arXiv but now accept submissions from it and even host their own mirrors of it. 3. Other fields may not behave like physics. We won’t know more until the levels of green OA in other fields approach those in physics. she merely asserts the threat. This style of rebuttal will not do. . . .” For more than eight years, green OA mandates have applied to research in many fields outside physics. These mandates are natural experiments and we’re still monitoring their effects. At Congressional hearings in 2008 and 2010, legislators asked publishers directly whether green OA was triggering cancellations. In both cases, publishers pointed to decreased downloads but not to increased cancellations. 4. There is evidence that green OA decreases downloads from publishers’ web sites. When users know about OA and toll-access editions of the same article, many will prefer to click through to the OA edition, either because they aren’t affiliated with a subscribing institution or because authentication is a hassle. Moreover, when users find an OA edition, most stop looking. But decreased downloads are not the same thing as decreased or canceled subscriptions. Moreover, decreased downloads of toll-access editions from publisher web sites are not the same thing as decreased downloads overall. No one suggests that green OA leads to decreased overall downloads, that is, fewer readers and less reading. On the contrary, the same evidence suggesting that OA increases citation impact also suggests that it increases readers and reading. 5. Most publishers voluntarily permit green OA. Supplementing the natural experiments of green OA mandates are the natural experiments of publishers who voluntarily permit green OA. The Nature Publishing Group is more conservative than most toll-access publishers by requiring a six-month embargo on green OA, but more progressive than most by positively encouraging green OA. NPG reported the latest results of its multidisciplinary natural experiment in January 2011: “We have, to date, found author self-archiving compatible with subscription business models, and so we have been actively encouraging self-archiving since 2005.” Even the strongest no-loophole, no-waiver policies preserve incentives to maintain toll-access journal subscriptions. The purpose of these two policy provisions is precisely to protect publishers against cancellations. They are deliberate concessions to publishers, adopted voluntarily by funding agencies as compromises with the public interest in immediate OA to the best editions. When we put the two together, we see that funder-mandated OA copies of peer-reviewed manuscripts won’t compete with toll-access copies of the published editions for six to twelve months, and there will never be OA copies of the more desirable published editions unless publishers voluntarily allow them. Publishers retain life-of-copyright exclusivity on the published editions. Even if OA archiving does eventually erode subscriptions outside physics, publishers have longer and better protection from these effects than their lobbyists ever acknowledge. The Association of College and Research Libraries addressed subscription incentives in a 2004 open letter on the NIH policy: “We wish to emphasize, above all, that academic libraries will not cancel journal subscriptions as a result of this plan. . . . Even if libraries wished to consider the availability of NIH-funded articles when making journal cancellation decisions, they would have no reasonable way of determining what articles in specific journals would become openly accessible after the embargo period.” In a 2006 study from the Publishing Research Consortium (PRC), Chris Beckett and Simon Inger asked 400 librarians about the relative weight of different factors in their decisions to cancel subscriptions. Other things being equal, the librarians preferred free content to priced content and short embargoes to longer ones. Publishers interpret this to mean that the rise of OA archiving will cause cancellations. The chief flaw with the study is its artificiality. For example, the survey did not ask about specific journals by name but only about resources with abstractly stipulated levels of quality. It also disregarded faculty input on cancellation decisions when all librarians acknowledge that faculty input is decisive. The result was a study of hypothetical preferences, not actual cancellation decisions. The three most important factors used to determine journals for cancellation, in declining order of importance, are that the faculty no longer require it . . . , usage and price. Next, availability of the content via open access (OA) archives and availability via aggregators were ranked equal fourth, but some way behind the first three factors. The journal’s impact factor and availability via delayed OA were ranked relatively unimportant. . . . With regard to OA archives, there was a great deal of support for the idea that they would not directly impact journal subscriptions. In short, toll-access journals have more to fear from their own price increases than from rising levels of green OA. Publishers who keep raising their prices aggravate the access problem for researchers and aggravate the sustainability problem for themselves. If the same publishers blame green OA and lobby against green OA policies, then they obstruct the solution for researchers and do very little to improve their own sustainability. Medknow saw its submissions and subscriptions increase when it began offering unembargoed full-text editions of its journals alongside its toll-access print journals. Hindawi Publishing saw its submissions rise steadily after it converted all its peer-reviewed journals to OA in 2007. Looking back on several years of rapidly growing submissions, company founder and CEO Ahmed Hindawi said in January 2010, “It is clear now more than ever that our open access conversion . . . was the best management decision we have taken. . . .” 9. Some publishers fear that green OA will increase pressure to convert to gold OA. Some publishers fear that rising levels of green OA will not only trigger toll-access journal cancellations but also increase pressure to convert to gold OA. (Likewise, some OA activists hope for this outcome.)

<question>:
What does the author use as a counterpoint to the concerns of the publishers about subscription cancelations?

<options>:
A The success of Gold OA policies for publishers
B A lack of empirical evidence
C The systematic requirement of waivers
D The fact that green OA practices were the standard in the past

<answer>:

B