question: Q:A 58-year-old man is brought to the emergency department by his wife 30 minutes after the sudden onset of severe retrosternal chest pain radiating to his back. He has a history of hyperlipidemia, hypertension, and type 2 diabetes mellitus. He has smoked one-half pack of cigarettes daily for 20 years. Medications include aspirin, captopril, atorvastatin, and metformin. His pulse is 80/min and blood pressure is 160/60 mm Hg. A CT scan of the chest is shown. Which of the following is the strongest predisposing factor for this patient's current condition?? 
  {'A': 'Diabetes mellitus', 'B': 'Age', 'C': 'Genetic collagen disorder', 'D': 'Hypertension', 'E': 'History of smoking'},