Passage Summary: The city promises to sweep every street at least once a month. If a neighborhood is extra dirty, it can get extra cleanings, and the city will provide those as soon as they are asked for.

Reasoning: The mayor establishes a policy where all streets are swept monthly, and neighborhoods with extra dirt qualify for additional sweepings that are fulfilled immediately upon request.

Analysis: This is a Must be True question, so we are looking for a deduction that is logically guaranteed by the mayor's rules. We have a set of conditional requirements: if a neighborhood is qualified and requests a sweeping, it must happen immediately. We also have a baseline rule: every street gets at least one sweeping per month. Look for an answer that combines these facts or applies the contrapositive. For instance, if a street wasn't swept this month, we know the mayor's policy was violated.