Which Statement Is True

Which statement is true?

A) In mammals, the set points for thermoregulatory responses are higher when skin is cold than when skin is hot.
B) In mammals maintained under constant environmental conditions, set points for thermoregulatory responses are constant.
C) Change in skin temperature provides positive feedback information to the mammalian thermoregulatory system.
D) Mild warming of the hypothalamus increases metabolic rate.
E) Mild cooling of the hypothalamus causes a drop in body temperature.