Correct Answer:(A) generalizes about the outcome of an event based on a single observation of a similar situation
Explanation:
The argument assumes that because more people participated than signed up last year, the same pattern will hold this year. However, this conclusion is drawn based on just one past event, which is a weak basis for a general rule. Just because more than 100 people participated last year does not guarantee the same will happen this year. This is a classic case of hasty generalization—drawing a broad conclusion from a single instance.
Eliminating Wrong Options:(B) takes for granted that people who participated in last year’s cleanup will participate this year
Elimination Reason: The argument does not assume that the exact same people will participate this year. It only assumes that more people will show up than signed up, which is a different kind of assumption.
(C) confuses a condition that is required for an outcome with one that is sufficient for that outcome
Elimination Reason: This flaw would involve incorrectly treating something that is necessary for success as if it guarantees success. However, the argument’s flaw is not about necessity vs. sufficiency—it is about predicting future behavior from a single past instance.
(D) overlooks the possibility that the cleanup will attract participants who are not residents in the community
Elimination Reason: The argument does not assume that only residents can participate. Even if non-residents participated, it wouldn’t undermine the reasoning—what matters is whether at least 100 people show up, not their residency status.
(E) defines a term in such a way as to ensure that whatever the outcome, it will be considered a positive outcome
Elimination Reason: The organizer does define "success" as having at least 100 participants, but they do not manipulate the definition to ensure that the event will be a success no matter what. If fewer than 100 people showed up, by their own definition, it would be a failure.