Wrong flaw. (A) sets up a conditional relationship: if a person is tense or anxious, then they will like the tranquilizing effects of art that portrays people as happy. It then tries to conclude that the absence of the necessary condition leads to the absence of the sufficient condition. The conclusion is about people who don’t like the art overall, however, instead of those who don’t like the art’s effects, so the necessary condition is not actually denied. The stimulus, meanwhile, concludes that the absence of a sufficient condition leads the the absence of a necessary condition, so (A) doesn’t match.

Wrong flaw. (B) gives us information about people who enjoy watching contact sports, then invalidly draws a conclusion about those who participate in contact sports. The stimulus, meanwhile, concludes that the absence of a sufficient condition leads the the absence of a necessary condition, so (B) doesn’t match.

(C) presents a conditional relationship: if an action movie involves dangerous/complicated special-effects scenes, then it’s expensive to produce. It then concludes that the absence of the sufficient condition (movies that don’t have these scenes) implies the absence of the necessary condition (they won’t be expensive to produce). The stimulus also concludes that the absence of a sufficient condition leads the the absence of a necessary condition, so (C) matches.

Wrong flaw. (D) tells us how adults feel about the music they listened to as kids, but this gives us no information about how they’ll feel about music they hear as adults. The stimulus, meanwhile, concludes that the absence of a sufficient condition leads the the absence of a necessary condition, so (D) doesn’t match.

No flaw. We’re given a conditional statement (if you’re a self-employed businessperson, then your salary fluctuates with the economy), and then told that bureaucrats don’t satisfy the sufficient condition. The argument then concludes that some people who satisfy the necessary condition must not be bureaucrats. This is valid since we know that self-employed businesspeople satisfy the necessary condition, but are not bureaucrats.