What would be the result of physical exertion on the part of a person who has fallen into cold water?

Correct Answer: Option C — it will increase the rate of heat loss from the body

Physical exertion in cold water increases blood flow to the extremities, accelerating convective heat loss and lowering core body temperature rapidly. According to marine survival guidelines, immobility and the Heat Escape Lessening Posture (HELP) preserve precious thermal boundaries.