question: Q:A 57-year-old man presents to the emergency department for evaluation of slurred speech and left arm and leg weakness over the last 3 hours. History reveals hypertension that is being treated with hydrochlorothiazide. Vital signs include: blood pressure of 110/70 mm Hg, heart rate 104/min, respiratory rate 18/min, and temperature 36.6°C (98.0°F). Physical examination reveals 2/5 strength in both left upper and lower extremities. After 2 hours, the patient’s symptoms suddenly disappear. An electrocardiogram (ECG) is obtained (see image). Which of the following medications could prevent ischemic attacks in this patient in the future?? 
  {'A': 'Acetylsalicylic acid', 'B': 'Clopidogrel', 'C': 'Enoxaparin', 'D': 'Heparin', 'E': 'Warfarin'},