The Nurse Caring for a Patient with Cushing Syndrome Is $\mathrm{x}$

The nurse caring for a patient with Cushing syndrome is describing the dexamethasone suppression test scheduled for tomorrow. What does the nurse explain that this test will involve?

A) Administration of dexamethasone orally, followed by a plasma cortisol level every hour for 3 hours
B) Administration of dexamethasone IV, followed by an $\mathrm{x}$ -ray of the adrenal glands
C) Administration of dexamethasone orally at $11 \mathrm{PM}$ , and a plasma cortisol level at $8 \mathrm{AM}$ the next morning
D) Administration of dexamethasone intravenously, followed by a plasma cortisol level 3 hours after the drug is administered