Which of the Following Statements Supports a Relationship Between the Menstrual

Which of the following statements supports a relationship between the menstrual cycle and female sexual activity?

A) Couples are able and likely to have intercourse at any time.
B) Couples exhibit a decrease in sexual activity during the middle of their menstrual cycle.
C) Women are more likely to initiate sex during the middle of their reproductive cycle.
D) Women on birth control pills exhibit a peak in sexual activity during the middle of the menstrual cycle.