You are answering a USMLE-style medical question. Question: A 46-year-old man is brought to the emergency department for evaluation of altered mental status. He was found on the floor in front of his apartment. He is somnolent but responsive when aroused. His pulse is 64/min, respiratory rate is 15/min, and blood pressure is 120/75 mm Hg. On physical examination, an alcoholic smell and slurred speech are noted. Neurological exam shows diminished deep tendon reflexes bilaterally and an ataxic gait. His pupils are normal. Blood alcohol concentration is 0.04%. An ECG shows no abnormalities. Which of the following is the most likely cause of this patient's symptoms? Options: A) Hypoglycemia B) Ethanol intoxication C) Cannabis intoxication D) Benzodiazepine intoxication " Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.