Which of These Statements Applies to Sweating

Multiple Choice

Which of these statements applies to sweating

A) It is caused by vasoconstriction of the skin vessels.
B) It is the body's only mechanism for gaining heat.
C) It increases the insulative capacity of the skin so that less heat can be gained from the environment.
D) It is one of the heat-loss mechanisms available to the body when the environmental temperature is high.