Community organizer: Before last year' s community cleanup, only 77 of the local residents signed up to participate, but then well over 100 actually participated. This year, 85 residents have signed up to participate. Since our community cleanup will be a success if we have at least 100 participants, we can be confident that this year' s cleanup will be a success. The reasoning in the community organizer's argument is most vulnerable to criticism on the grounds that the argument ['defines a term in such a way as to ensure that whatever the outcome, it will be considered a positive outcome', 'confuses a condition that is required for an outcome with one that is sufficient for that outcome', "takes for granted that people who participated in last year's cleanup will participate this year", 'generalizes about the outcome of an event based on a single observation of a similar situation']