A 40-year-old woman presents with an 8-month history of severe headaches, weakness, and dizziness. Blood pressure is 180/110 mm Hg. Physical examination shows diminished tendon reflexes. An abdominal CT scan reveals a 4-cm mass in the right adrenal gland. The results of laboratory studies include serum potassium of 2.3 mEq/L, serum sodium of 155 mEq/L, plasma cortisol of 25 mg/dL (8 AM) and 20 mg/dL (4 PM), and low plasma renin. These clinical and laboratory findings are consistent with an adrenal tumor that secretes which of the following hormones?