This question seems more ambiguous than most found on the LSAT. I feel like reading understated academic writing hurt me on this one, as I was over-eager to read too much emotion into the author's put-downs.
Can you tell I got this one wrong?
When I get a question wrong, I try to find a rule I could use on future tests to avoid to avoid making the same mistake again. In this case, I came up with the following:
In an RC question based on a value-based characterization, the answer that is least falsifiable is a better choice than one which is more specific, and more debatable, even if the latter choice is potentially more apt.
Applying that logic this question, I feel reasonable people could disagree about whether the author is exasperated, but he is undeniably unimpressed.
Put another way, it would be much easier to argue that the author is not exasperated than it would be to argue that he is not unimpressed.