Kapok life jackets should NOT be __________.

Correct Answer: Option D — All of the above

Kapok life jackets utilize natural kapok fibers enclosed in heat-sealed plastic liners. Per 46 CFR, they must never be exposed to open flames, left unprotected on open decks where weathering degrades materials, or used as makeshift seats, pillows, or footrests, which compresses and ruins their buoyancy.