question: Q:A 63-year-old man comes to the physician because of a 4-month history of urinary hesitancy and poor urinary stream. Digital rectal examination shows a symmetrically enlarged, nontender prostate. Serum studies show a prostate-specific antigen concentration of 2 ng/mL (N < 4). Pharmacotherapy with finasteride is initiated. Which of the following is the most likely effect of this drug?? 
  {'A': 'Decreased internal urethral sphincter tone', 'B': 'Increased prostatic apoptosis', 'C': 'Decreased production of urine', 'D': 'Increased penile blood flow', 'E': 'Decreased bladder contractions'},