You can't, I daresay, simply skim the answer choices and get the gist of what is being stated with this one.
In his new book on his complex scientific research, R frequently imputes bad faith to researchers disagreeing with him. A troubling aspect of R’s book is his stated conviction that other investigators’ funding sources often determine what “findings” those investigators report. Add to this that R has often shown himself to be arrogant, overly ambitious, and sometimes plain nasty, and it becomes clear that R’s book does not merit attention from serious professionals.
The author of the book review commits which one of the following reasoning errors?
(A) using an attack on the character of the writer of the book as evidence that this person is not competent on matters of scientific substance
The answer. The reviewer clearly conflates the author's bad personality traits with the author's ability or credibility when it comes to scientific research. It sounds easy to say this now, but POE helped get me here as well.
(B) taking it for granted that an investigator is unlikely to report findings that are contrary to the interests of those funding the investigation
This one was fairly tempting. But if we really read the passage closely we see that the REVIEWER does not take it for granted. The AUTHOR may take it for granted, but the REVIEWER does not.
(C) dismissing a scientific theory by giving a biased account of it
Nope. Be careful not to conflate the bias the REVIEWER may have for the AUTHOR with the AUTHOR'S THEORY. The reviewer is not saying that there is something wrong with the theory proposed. The reviewer is saying that the author's bad traits make whatever has been theorized something that should be dismissed simply on that basis.
(D) presenting as facts several assertions about the book under review that are based only on strong conviction and would be impossible for others to verify
The only assertion was the TROUBLING aspect, but that could easily be verified by reading it, I daresay. I didn't really consider this option, I think.
(E) failing to distinguish between the criteria of being true and of being sufficiently interesting to merit attention
Nope. Nothing about attention that I can see. Didn't really consider this, I think.
5 Verbal tips from a V48 GMAT Tutor