In the question below, a statement/passage is given, followed by five options. Choose the option that represents the assumption underlying the information given in the passage. An assumption is something supposed or taken for granted. Passage: The city’s public health department has mandated that all fitness centers and gyms must temporarily transition to outdoor-only operations, even if they have installed high-grade industrial air filtration systems indoors.

Analysis of Statement: The passage states that the mandate applies even to those who have already installed high-grade filters. This implies that the presence of the filters does not change the department's decision that indoor operations are currently unsafe. Evaluation of Option C: This is the underlying assumption. For the mandate to apply even to gyms with filters, the health department must "take for granted" or "suppose" that these filters are not a perfect solution for the specific risks associated with indoor exercise. If the filters were 100% effective, the mandate for those specific gyms wouldn't be necessary. Evaluation of other options: (A) is incorrect as the mandate applies regardless of a gym's financial status. (B) describes a possible future policy, not an underlying assumption for the current rule. (D) describes a reaction to the move, not the reason for it. (E) presents a fact that would actually make the mandate more problematic, rather than explaining the logic behind it.