You are answering a USMLE-style medical question. Question: A 58-year-old male presents with an acutely elevated blood pressure of 220/140 mmHg. The patient complains of a headache and chest pain, and he has been vomiting for the last several hours. Physical exam demonstrates papilledema and a depressed level of consciousness. To treat this patient's hypertensive emergency, he is started on an IV medication commonly used in this situation. The agent exerts its effect by releasing nitric oxide as a metabolite, which subsequently activates guanylate cyclase and increases production of cGMP in vascular smooth muscle. Which of the following clinical effects would be expected from administration of this medication? Options: A) Decreased cardiac contractility B) Increased left ventricular end-diastolic pressure C) Decreased stroke volume D) Decreased pulmonary capillary wedge pressure Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.