You are answering a USMLE-style medical question. Question: A 67-year-old man presents to his primary care physician for a follow up appointment. He was released from the hospital 1 week ago for an appropriately managed ST-elevation myocardial infarction (STEMI); however, he has not filled any of his prescriptions and did not attend his follow up appointment as scheduled. The patient has a past medical history of hypertension and peripheral vascular disease. His temperature is 97.5°F (36.4°C), blood pressure is 167/118 mmHg, pulse is 90/min, respirations are 14/min, and oxygen saturation is 99% on room air. Physical exam is notable for jugular venous distention and bilateral lower extremity pitting edema. Echocardiography demonstrates an ejection fraction of 55%. Which of the following medications will have the greatest mortality benefit in this patient? Options: A) Atenolol B) Lisinopril C) Metoprolol succinate D) Propranolol Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.