You are answering a USMLE-style medical question. Question: A 67-year-old woman presents to her primary care physician for urinary incontinence. She has been waking up every morning with her underwear soaked in urine. She notices that at work if she does not take regular bathroom breaks her underwear will have some urine in it. She urinates 5 to 11 times per day but she claims it is a small volume. Her current medications include lisinopril, metformin, insulin, aspirin, atorvastatin, sodium docusate, and loratadine. Her temperature is 98.2°F (36.8°C), blood pressure is 167/108 mmHg, pulse is 90/min, respirations are 15/min, and oxygen saturation is 99% on room air. Physical exam is notable for decreased pinprick sensation in the lower extremities and a systolic murmur along the right upper sternal border. Which of the following is the best treatment for this patient? Options: A) Bethanechol and intermittent straight catheterization B) Bethanechol during the day and oxybutynin at night C) No recommendations needed D) Reduce fluid intake and discontinue diuretics Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.