No flaw. This establishes that it’s widely known that pollution might not be reduced, so it’s reasonable to conclude that Jorge probably believes that bird extinctions will occur. The stimulus is flawed because there’s no reason to assume that Katelin knows about the car show.

This assumes Bo believes something simply because it follows logically from his belief about his backyard. However, it overlooks the possibility that Bo might not know much about raspberry bushes, which means he might not have any opinion on the likelihood of them growing well in his yard.

No flaw. This establishes that most people who believe what Wanda does also believe something else, so it’s reasonable to conclude that she is probably among them.

Wrong flaw. The fact that most people who are good at math are good at chess cannot be used to support the claim that most chemists are good at chess. Chemists may only fall into the minority of mathematicians who aren’t good at chess. The stimulus doesn’t have a quantifier flaw—it merely makes an assumption about someone’s belief.

Wrong flaw. This confuses a sufficient condition for a necessary one. Garlic could increase alertness without improving circulation. Further, all of (E)’s premises are about Dr. Bowder’s beliefs, whereas the stimulus makes an assumption about someone’s belief on the basis of an event’s logical consequence.