It is a poor question in my opinion. I could find some nitpicks with A, but there is a potential nitpick with C too. Only by weighing nitpicks could one try to guess what the correct answer is supposed to be.
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sb70012It's taken from GMAT book.https://books.google.com/books?id=60XU1QNK9SsC&pg=RA1-PT323&lpg=RA1-PT323&dq=A+scientist+risks+lo...At that link I can see some discussion about some similar sentences, but I do not se
sb70012A looks fine. What's wrong with A?For me it's the comma that is disturbing. In choice A it should be anecdotal evidence which is in conflict with (no comma), which might conceivably be reduced by omitting which is. But no scientist would use anecdotal evidence that was in conflict with more reliable data, so that's clearly not the inten
CalifJimFor me it's the comma that is disturbing. In choice A it should be anecdotal evidence which is in conflict with (no comma), which might conceivably be reduced by omitting which is.I read "in conflict with more reliable data" as adverbial, modifying "relying".