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

<passage>:
Will a general shift to OA leave casualties? For example, will rising levels of green OA trigger cancellations of toll-access journals? This question matters for those publishers (not all publishers) who fear the answer is yes and for those activists (not all activists) who hope the answer is yes. So far, unfortunately, it doesn’t have a simple yes-or-no answer, and most discussions replace evidence with fearful or hopeful predictions. The primary drivers of green OA are policies at universities and funding agencies. Remember, all university policies allow publishers to protect themselves at will. (See section 4.1 on policies.) For example, universities with loophole or deposit mandates will not provide green OA when publishers do not allow it. Universities with Harvard-style rights-retention mandates will not provide OA when authors obtain waivers or when publishers require authors to obtain waivers as a condition of publication. 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. 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. 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. 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. 6. Green OA mandates leave standing at least four library incentives to maintain their subscriptions to toll-access journals. Second, all funder OA mandates apply to the final version of the author’s peer-reviewed manuscript, not to the published version. If the journal provides copyediting after peer review, then the policies do not apply to the copyedited version, let alone to the formatted, paginated published edition. Libraries wanting to provide access to copyedited published editions will still have an incentive to subscribe. 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. Third, funder OA mandates only apply to research articles, not to the many other kinds of content published in scholarly journals, such as letters, editorials, review articles, book reviews, announcements, news, conference information, and so on. Libraries wanting to provide access to these other kinds of content will still have an incentive to subscribe. Fourth, funder OA mandates only apply to articles arising from research funded by the mandating agency. Very few journals publish nothing but articles from a single funder, or even from a set of funders all of whom have OA mandates. Libraries wanting to provide access to all the research articles in a journal, regardless of the sources of funding, will still have an incentive to subscribe. This incentive will weaken as more and more funders adopt OA mandates, but we’re very far from universal funder mandates. As we get closer, unfunded research will still fall outside this category and the three other incentives above will still stand. 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.” 7. Some studies bear on the question of whether increased OA archiving will increase journal cancellations. A less hypothetical study was commissioned by publishers themselves in the same year. From the summary: 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. 8. OA may increase submissions and subscriptions. 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.) 10. Green OA policies are justified even if they do create risks for toll-access journals. If we’re only interested in the effect of rising levels of green OA on toll-access publishers, then we can stop at points 1–9. But if we’re interested in good policy, then we must add one more factor: Even if green OA does eventually threaten toll-access journal subscriptions, green OA policies are still justified. I won’t elaborate this point here, since it takes us beyond the topic of casualties to the full case for OA, which is spread throughout the rest of the book. But here’s one way to put the debate in perspective: There are good reasons to want to know whether rising levels of green OA will trigger cancellations of toll-access journals, and perhaps even to modify our policies in light of what we learn. But there are no good reasons to put the thriving of incumbent toll-access journals and publishers ahead of the thriving of research itself.

<question>:
Why does the author think the issue of Green OA is important?

<options>:
A It will lead to increased use of toll-access publications
B It will decrease the risk of publisher monopoly
C It would increase publisher profits
D It will increase access to published literature

<answer>:

D