During Its Months-Long Hibernation, the Body Temperature of a Ground

Multiple Choice

During its months-long hibernation, the body temperature of a ground squirrel

A) is held at a constant 37°C.
B) is held at a constant 5°C.
C) varies between 5 and 37°C, depending on the frequency of arousals from hibernation.
D) varies between 5 and 15°C, depending on the external temperature.
E) varies between -5 and +5°C, depending on the external temperature.