The oral contraceptive pill, informally called "the pill," contains estrogen and progesterone, or a synthetic mimic of this hormone. The combination of these two hormones, taken in the pill and circulating in the blood, works because of .

Ovulation is prevented in the woman who takes this pill. Because these hormones combination makes the body of the woman taken the pill to show the physiological characteristics of pregnancy, Therefore  the entire ovarian cycle is disrupted, thus fertilization is prevented, consequently no pregnancy.

Explanation:

I think the answer in C