Researchers Studying Baboons Found That Subordinate Animals, Unlike Dominant Animals

Researchers studying baboons found that subordinate animals, unlike dominant animals, continually secrete cortisol, probably because their lives are so stressful.What did the researchers discover about the subordinate males' HPA axis?

A) It is less sensitive to the effects of cortisol and therefore less efficient in turning off the stress response.
B) It is more sensitive to the effects of cortisol and therefore less efficient in turning off the stress response.
C) It is associated with an increased sensitivity of the pituitary gland.
D) It is associated with a decreased sensitivity of the pituitary gland.