In Order to Use Fertility Awareness Methods, a Woman Must

In order to use fertility awareness methods, a woman must be able to predict when she will _______ and abstain from coitus _______.

A) menstruate; during her menstrual period
B) menstruate; at least 6 days prior and 2 days after the onset of menstruation
C) ovulate; at least 6 days prior and 2 days after the predicted ovulation
D) ovulate; at least 2 days prior and 6 days after the predicted ovulation
E) ovulate; from the time of ovulation until the onset of her next menstrual period