【单选题】

The nurse is teaching a group of couples in a childbirth class. The nurse describes normal labor, including the premonitory signs of labor. Which of the following comments from the client indicates that further teaching is necessary
A．"My membranes won't rupture until I'm ready to deliver. "

B．"I may feel Braxton Hicks contractions as my pregnancy progresses. "
C．"Lightening usually occurs 2 weeks before labor begins in a first pregnancy. "
D．"I'll begin to see a bloody mucus vaginal discharge as my cervix begins to dilate. "