A primigravida at 36 weeks’ gestation tells the nurse that she has moderate breast tenderness. The nurse teaches the client with some suggestions for relief measures. Which of the following statements by the client suggests the nurse that the client needs further instructions（）
A. "I should wear a supportive bra at all times. "
B. "I should clean my nipples with soap. "
C. "I should change my sleeping positions. "
D. "I should clean up the colostrum with water. "
