Which of the following is a reflexive homeostatic adjustment to a body temperature that is too low?

A) vasodilation
B) repetitive fur licking
C) ruffling of the fur
D) moving into the sun

Vasodilation

is the widening of blood vessels which results from relaxation of the muscular walls of the vessels, increasing blood flow.

Homeostatic Adjustment

The process by which living organisms regulate their internal environment to maintain a stable, optimal condition despite external changes.