Answer: Option A.
It works by stopping ovulation and thickening the cervical mucus.
Step-by-step explanation:
Depo provera (medroxyprogesterone acetate) is a contraceptive injection that contain the hormones progestin which is used as a birth control. It stops the woman from getting pregnant by stopping ovulation and causing thickening of cervical mucus. It is an injection given every three months, it is safe and convinient for birth control.
It has some disadvantages and these include, it can cause irregular periods, it does not prevent against sexually transmitted disease, it should be stop several months before you can get pregnant e.t.c.