When kept afloat by a life jacket, survival time in water at 15°C is

A. False It is usually under two hours.

B. False It is limited by hypothermia.

C. True This improves insulation by trapping layers of water around the body to form a stable microclimate.

D. False Swimming increases heat loss by disturbing the microclimate.

E. True Due to better thermal insulation by the superficial fat.