Which of the Following Accurately Describes Sympathetic Control of Blood

Which of the following accurately describes sympathetic control of blood vessels in the skin during thermoregulation?

A) Heat causes an increase in sympathetic activity, resulting in vasoconstriction.
B) Heat causes a decrease in sympathetic activity, resulting in vasodilation.
C) Heat causes an increase in sympathetic activity, resulting in vasodilation.
D) Heat causes a decrease in sympathetic activity, resulting in vasoconstriction.
E) Heat activates the parasympathetic activity and has no effect on the sympathetic nervous system.