Which of the Following Adaptations Would Not Produce an Increase

Multiple Choice

Which of the following adaptations would not produce an increase in an ectotherm's body temperature?

A) Repeated contraction of flight muscles without movement
B) Cluster or huddling behavior
C) Decreased surface-to-surface contact with a cold environment
D) Circulatory changes to maintain core or internal temperatures greater than the animal's peripheral temperatures
E) Metabolism of brown fat