A handrail return is a small detail with a specific safety purpose: it eliminates a protruding end that clothing can catch on. The failure it prevents is a fall on stairs, where a sleeve, a cuff, a bag strap or a pocket snags on the open end just as the user reaches the last step and is committed to their footing. The requirement is about the end condition alone — a rail with a cut end is structurally identical to one that returns, and it is graspable along its whole length either way. Recognizing that the defect is a snag hazard rather than a strength or attachment problem is the discrimination this question is built to test.