By Taking into Consideration Both the Length of Time Sperm

By taking into consideration both the length of time sperm can survive in the female reproductive tract and the length of time an ovum remains viable after ovulation, the "fertile window" of a menstrual cycle includes

A) only the 24 hours after ovulation.
B) only the 24 hours before and the 24 hours after ovulation.
C) about 5 days before and 5 days after ovulation.
D) about 5 days before and 5 days after menstruation.
E) about 5 days before and 1 day after ovulation.