Normally,activity of the Hypothalamic-Pituitary-Adrenal Axis Is Regulated by a Feedback

Normally,activity of the hypothalamic-pituitary-adrenal axis is regulated by a feedback loop that reduces the release of cortisol,like a rev limiter on an automobile engine.What is the order of signaling by which this reduction takes place?

A) Hypothalamus to pituitary gland to adrenal glands
B) Hypothalamus to hippocampus to adrenal glands
C) Hippocampus to pituitary gland to adrenal glands
D) Hippocampus to hypothalamus to adrenal glands