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Question 124·Easy·Text Structure and Purpose

Many people assume that short naps during the workday inevitably reduce productivity. Yet research indicates that brief, carefully timed naps can sharpen attention and improve mood. Reflecting this, some companies have added quiet “rest pods” to their offices. Still, such programs require clear guidelines; naps that run too long can leave employees drowsy rather than refreshed.

Which choice best describes the overall structure of the text?