question: Q:A 42-year-old woman, gravida 5, para 5, comes to the physician because of a 6-month history of occasional involuntary urine loss that is exacerbated by coughing, sneezing, and laughing. She has no urgency or dysuria. Physical examination shows normal appearing external genitalia, vagina, and cervix. There is a loss of urine with the Valsalva maneuver. The physician recommends doing Kegel exercises. Which of the following muscles is strengthened by these exercises?? 
  {'A': 'Compressor urethrae', 'B': 'Internal urethral sphincter', 'C': 'Sphincter urethrae', 'D': 'Levator ani', 'E': 'Deep transverse perineal muscles'},