In Preparation for a Physiological Experiment an Animal Is Placed $\degree$

In preparation for a physiological experiment an animal is placed in a temperature-controlled chamber and allowed to acclimate. During the experiment the temperature within the chamber is steadily increased and measurements of the animal's metabolic rate are taken at regular intervals. The results show that the metabolic rate of the animal decreases steadily over the first 15 $\degree$ C, remains constant for the next 5 $\degree$ C and then increases steeply over the final 10 $\degree$ C. You would predict that, during this experiment, the body temperature of the animal would

A) follow the same pattern as the metabolic rate.
B) increase steadily at the same rate as the temperature within the chamber.
C) increase steadily, but more slowly than the temperature within the chamber.
D) remain constant.
E) decrease as the temperature increases.