The most important reason for taking anti-seasickness pills as soon as possible after entering a life raft is to __________.

Correct Answer: Option C — prevent loss of body moisture by vomiting

Dehydration is the primary threat to survival in a life raft. Seasickness causes vomiting, which rapidly depletes body fluids and electrolytes. Taking anti-seasickness medication immediately helps retain essential moisture, which is critical for maintaining physiological function and extending survival time in a maritime emergency.