A client who has stress incontinence has been given a pamphlet that describes Kegel exercises. Which of the following statements indicates that the client has understood the instructions in the pamphlet

A．"It will probably take a year before the exercises are effective. "

B．"I should perform these exercises every evening. "

C．"I can do these exercises sitting up, lying down, or standing. "

D．"I need to tighten my abdominal muscles to do these exercises correctly. "