Q. A 75-year-old male presents to his physician’s office with a complaint of urinary incontinence. He reports that he often feels as though his bladder is not completely empty, and sometimes leaks small amounts of urine throughout the day. He has noticed that these episodes have been occurring more frequently over the past year, and is now wearing pads to manage his incontinence. The patient has a history of prostate surgery and diabetes, and takes several medications for his conditions. Physical examination reveals an enlarged prostate, but no other abnormalities. Which of the following is the most likely diagnosis?