You are answering a USMLE-style medical question. Question: A 58-year-old African American man presents for his yearly wellness visit. He says he has been unsuccessful at losing weight and would like help. His last colonoscopy was 8 years previously, which was normal. Past medical history is significant for obstructive sleep apnea (OSA) and hypertension. Current medications are isosorbide dinitrate/hydralazine and aspirin 81 mg orally daily. He is also on CPAP to manage his OSA. The patient denies any history of smoking or recreational drug use and drinks 1 or 2 beers on weekends. Family history is significant for prostate cancer in his father and hypertension and diabetes mellitus type 2 in his mother. His vital signs include: temperature 36.8°C (98.2°F), pulse 97/min, respiratory rate 16/min, blood pressure 120/75 mm Hg. BMI is 30 kg/m2. Physical examination is unremarkable. Fasting blood glucose is 90 mg/dL. Which of the following preventative screening tests would be most appropriate for this patient at this time? Options: A) PSA B) Digital rectal exam C) Abdominal ultrasound D) Flexible sigmoidoscopy Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.