The correct answer is D) Apply as many layers of clothing as possible before donning a survival suit to preserve body heat. When abandoning a vessel in distress and entering cold water, the primary concern is preventing hypothermia. Wearing as many layers of clothing as possible before putting on a survival suit helps retain body heat and slows the loss of core body temperature. This is the most effective way to delay the onset of hypothermia in cold water conditions. The other options are incorrect because: A) Constant movement can actually increase heat loss, B) Removing layers decreases insulation, and C) Consuming cold liquids can lower core body temperature.