You are answering a USMLE-style medical question. Question: A 70-year-old man is brought to the emergency department by staff of the group home where he resides because of worsening confusion for the past week. He has a history of major depressive disorder and had an ischemic stroke 4 months ago. Current medications are aspirin and sertraline. He is lethargic and disoriented. His pulse is 78/min, and blood pressure is 135/88 mm Hg. Physical examination shows moist oral mucosa, normal skin turgor, and no peripheral edema. While in the waiting room, he has a generalized, tonic-clonic seizure. Laboratory studies show a serum sodium of 119 mEq/L and an elevated serum antidiuretic hormone concentration. Which of the following sets of additional laboratory findings is most likely in this patient? $$$ Serum osmolality %%% Urine sodium %%% Serum aldosterone $$$ Options: A) ↓ ↓ ↓ B) ↑ ↓ normal C) ↓ ↑ ↑ D) ↓ ↑ ↓ Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.