Cortisol is secreted by the adrenal cortex in response to stress. In addition to its function in a stress response, it functions in negative feedback by

A) inhibiting the hypothalamus so that corticotropin releasing hormone (CRH) secretion is reduced.
B) reduces the secretion of ACTH by the anterior pituitary.
C) suppressing its own secretion by its actions on the hypothalamus and anterior pituitary.
D) all of these.
E) none of these.