What Is the Link Between Major Depression and Cortisol Secretion

What is the link between major depression and cortisol secretion?

A) Individuals with depression show suppression of plasma cortisol when given dexamethasone.
B) Individuals with depression have a decreased plasma cortisol level, despite the administration of exogenous corticosteroids.
C) Individuals with depression show that persistently elevated plasma cortisol levels can result in inflammation that is believed to trigger depression.
D) Individuals with depression have normal plasma cortisol levels throughout the day when they take antidepressant medication as prescribed.