37. Which statement about glands and hormones is true?
(A) The anterior pituitary produces multiple hormones that affect activity of other endocrine glands and cells of the body.
(B) The posterior pituitary produces melatonin, which helps regulate biological rhythms.
(C) The pineal gland is the master control center of the endocrine system.
(D) The hypothalamus is an endocrine gland responsible for producing the hormone calcitonin.
(E) All statements are true.