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

<passage>:
Krugman's Life of Brian Paul Krugman replies to John Cassidy Paul Krugman replies to M. Mitchell Waldrop Paul Krugman loves to berate journalists for their ignorance of economics, particularly his economics, but on this occasion, I fear, his logic is more addled than usual. I am reluctant to dignify his hatchet job with a lengthy reply, but some of his claims are so defamatory that they should be addressed, if only for the record. 1) Krugman claims that my opening sentence--"In a way, Bill Gates's current troubles with the Justice Department grew out of an economics seminar that took place thirteen years ago, at Harvard's John F. Kennedy School of Government"--is "pure fiction." Perhaps so, but in that case somebody should tell this to Joel Klein, the assistant attorney general in charge of the antitrust division. When I interviewed Klein for my piece about the Microsoft case, he singled out Brian Arthur as the economist who has most influenced his thinking about the way in which high-technology markets operate. It was Klein's words, not those of Arthur, that prompted me to use Arthur in the lead of the story. 5) For a man who takes his own cogitations extremely seriously, Krugman is remarkably cavalier about attributing motives and beliefs to others. "Cassidy has made it clear in earlier writing that he does not like mainstream economists, and he may have been overly eager to accept a story that puts them in a bad light," he pronounces. I presume this statement refers to a critical piece I wrote in 1996 about the direction that economic research, principally macroeconomic research, has taken over the past two decades. In response to that article, I received dozens of messages of appreciation from mainstream economists, including from two former presidents of the American Economic Association. Among the sources quoted in that piece were the then-chairman of the White House Council of Economic Advisers (Joseph Stiglitz), a governor of the Federal Reserve Board (Laurence Meyer), and a well-known Harvard professor (Gregory Mankiw). To claim, as Krugman does, that I "don't like mainstream economists" and that I am out to denigrate their work is malicious hogwash. The fact of the matter is that I spend much of my life reading the work of mainstream economists, speaking to them, and trying to find something they have written that might interest the general public. In my experience, most economists appreciate the attention. 6) I might attach more weight to Krugman's criticisms if I hadn't recently reread his informative 1994 book Peddling Prosperity , in which he devotes a chapter to the rediscovery of increasing returns by contemporary economists. Who are the first scholars Krugman mentions in his account? Paul David, an economic historian who wrote a famous paper about how the QWERTYUIOP typewriter keyboard evolved and, you guessed it, Brian Arthur. "Why QWERTYUIOP?" Krugman wrote. "In the early 1980s, Paul David and his Stanford colleague Brian Arthur asked that question, and quickly realized that it led them into surprisingly deep waters. ... What Paul David, Brian Arthur, and a growing number of other economists began to realize in the late seventies and early eighties was that stories like that of the typewriter keyboard are, in fact, pervasive in the economy." Evidently, Krugman felt four years ago that Arthur's contribution was important enough to merit a prominent mention in his book. Now, he dismisses the same work, saying it "didn't tell me anything that I didn't already know." Doubtless, this change in attitude on Krugman's part is unconnected to the fact that Arthur has started to receive some public recognition. The eminent MIT professor, whose early academic work received widespread media attention, is far too generous a scholar to succumb to such pettiness. Paul Krugman replies to John Cassidy: Thanks to Paul Krugman for his lament about credulous reporters who refuse to let facts stand in the way of a good story ("The Legend of Arthur"). As a professional journalist, I found his points well taken--even when he cites my own book, Complexity as a classic example of the gullibility genre. Among many other things, Complexity tells the story of the Irish-born economist Brian Arthur and how he came to champion a principle known as "increasing returns." The recent New Yorker article explains how that principle has since become the intellectual foundation of the Clinton administration's antitrust case against Microsoft. Krugman's complaint is that the popular press--including Complexity and The New Yorker --is now hailing Brian Arthur as the originator of increasing returns, even though Krugman and many others had worked on the idea long before Arthur did. I leave it for others to decide whether I was too gullible in writing Complexity . For the record, however, I would like to inject a few facts into Krugman's story, which he summarizes nicely in the final paragraph: Which brings me to Professor Krugman's letter, and my reply. I remember the exchange very well. Obviously, however, my reply failed to make clear what I was really trying to say. So I'll try again: a) During our interviews, Brian went out of his way to impress upon me that many other economists had done work in increasing returns--Paul Krugman among them. He was anxious that they be given due credit in anything I wrote. So was I. c) So, when I received Krugman's letter shortly after Complexity came out, I was puzzled: He was complaining that I hadn't referenced others in the increasing-returns field--Paul Krugman among them--although I had explicitly done so. d) But, when I checked the published text, I was chagrined to discover that the critical passage mentioning Krugman wasn't there. Schuster had suggested a number of cuts to streamline what was already a long and involved chapter on Brian's ideas. I accepted some of the cuts, and restored others--including (I thought) the passage that mentioned Krugman. In the rush to get Complexity to press, however, that passage somehow wound up on the cutting-room floor anyway, and I didn't notice until too late. Paul Krugman replies to M. Mitchell Waldrop: Paul Krugman's attack on Brian Arthur ("The Legend of Arthur") requires a correction of its misrepresentations of fact. Arthur is a reputable and significant scholar whose work is indeed having influence in the field of industrial organization and in particular public policy toward antitrust policy in high-tech industries. Krugman admits that he wrote the article because he was "just pissed off," not a very good state for a judicious statement of facts, as his column shows. After reading Paul Krugman vent his spleen against fellow economist Brian Arthur in "The Legend of Arthur," I couldn't help wondering whose reputation he was out to trash, Arthur's or his own. Krugman seems to fear a plot to deny economists their intellectual due. If one exists, Arthur is not a likely suspect. In a series of long interviews with me a year ago (for Worth magazine), I tried, vainly, to get Arthur to tell me how his ideas about increasing returns have encouraged a new strain of economic investigations. Despite much prodding, Arthur obliged only by placing himself in a long line of theorists dating back to Adam Smith and Alfred Marshall. I also found him disarmingly generous in giving credit to the biologists, physicists, and fellow economists who have helped advance his own thinking. Savvy to the journalist's quest for heroes, Arthur urged me to focus on his ideas, not his rank among his peers. Krugman has made a career out of telling other economists to pay better attention to the facts, yet as a chronicler of Arthur's career and inner life, Krugman seems to have listened only to his own demons.

<question>:
What solution does Paul Krugman suggest to address his concerns?

<options>:
A Journalists and authors should rely on only a handful of trusted sources.
B Journalists and authors should show more care in referencing and crediting work done by all parties.
C Journalists and authors should always fact-check information through Nobel laureates.
D More media attention should be given to issues of academic plagiarism.

<answer>:

B