A Woman Asks the Nurse,"How Do Oral Contraceptives Prevent Pregnancy

A woman asks the nurse,"How do oral contraceptives prevent pregnancy?" The nurse explains that the combination of estrogen and progesterone in oral contraceptives:

A) makes cervical mucus hostile to sperm.
B) prevents ovul ation.
C) prohibits implantation of the egg.
D) acts as a barrier by destroying sperm.