During Cool Daytime Temperatures, an Endotherm and an Ectotherm Both

During cool daytime temperatures, an endotherm and an ectotherm both regulate blood flow to their extremities. Which of the following statements reflects how each responds to cooler daytime temperatures?

A) Both endotherms and ectotherms vasodilate vessels to their extremities so that they can gain heat from the environment.
B) Both endotherms and ectotherms vasoconstrict vessels to their extremities so that they can reduce heat loss to the environment.
C) Endotherms vasodilate vessels to their extremities to gain heat from the environment. Ectotherms vasoconstrict vessels to their extremities to reduce heat loss to the environment.
D) Endotherms vasoconstrict vessels to their extremities to gain heat from the environment. Ectotherms vasodilate vessels to their extremities to reduce heat loss to the environment.
E) Endotherms vasoconstrict vessels to their extremities to reduce heat loss to the environment. Ectotherms vasodilate vessels to their extremities to gain heat from the environment.