Passage Summary: Giving workers flexible hours makes them happier and more productive, but it doesn't do much for bosses (who usually already have control over their time), and the perks fade if the rules are too loose.

Reasoning: Data indicates that flexible schedules benefit non-managers more than managers, though these benefits for non-managers decrease over time or if the flexibility is excessive.

Analysis: Since this is a 'Most Strongly Supported' question, we aren't looking for a flaw; we are looking for a logical inference. The stimulus provides a nuanced view of workplace flexibility: it works for some but not others, and it has diminishing returns. A strong answer might connect the lack of manager improvement to their existing 'autonomy' or suggest that there is an optimal level of flexibility that shouldn't be exceeded. Avoid any choice that makes a 'must' statement or an overly broad generalization.