Wrong flaw. While (A) does commit the error of using a too-small sample (ten voters is not enough!), its second flaw is different from the one in the stimulus. Here, the premise is about something that’s pretty distinct from the conclusion (popular leadership doesn’t necessarily contribute to having the best policies). In the stimulus, the premise is about something that directly impacts the subject of the conclusion (we’re told that the tartar control formula does help fight cavities!)

Only one of the flaws. Here, we don’t have the too-small sample flaw: the conclusion is about some of the nation’s voters, and the premise gives us enough information to support a statement about that group (ten voters are some voters). (B) does commit the hasty generalization flaw from the stimulus—even if the voters think the policies Gomez is committed to are the best, that doesn’t mean they believe that Gomez is the best! Maybe they don’t think she’d be capable of passing the policies.

Wrong flaw. (C)’s sample isn’t too small—they polled thousands of voters! (C)’s hasty generalization error is also less severe than the one in the stimulus. The flaw in (C) is that voters thinking that Gomez’ policies are the best doesn’t mean voters generally believe that Gomez herself is the best. But (C)’s conclusion that voters “generally believe” something is easier to support than the stimulus’ claim that dentists “know” something.

The authors surveyed ten voters, each of whom agreed that Gomez’ policies would help the nation more than any other policies. Based on these survey results, the authors claim that the nation’s voters know that the best way to help the nation is to elect Gomez. This commits the same two cookie-cutter flaws as the stimulus: it uses too small a sample size, and it makes a hasty generalization (believing that Gomez’ policies are the most helpful doesn’t mean someone believes that the best way to help is by electing Gomez!)

Wrong flaw. This is even weaker than the stimulus! At least the stimulus tells us that Blizzard’s formula is the most effective. (E) only tells us that Gomez would help—he might not even be the most helpful candidate!