Physical exertion on the part of a person who has fallen into cold water can __________.

Correct Answer: Option B — increase the rate of heat loss from the body

Physical exertion while immersed in cold water accelerates blood circulation to the extremities, dramatically increasing core body heat loss and significantly shortening predicted cold-water survival time. Hypothermia survival techniques mandate remaining motionless in the Heat Escape Lessening Posture (HELP).