Match each statement with the type of contraceptive it describes.

A. This contraceptive is 99% effective when used properly but only 91% effective in real life.
Emergency contraception
B. This is the most effective method and the only way to ensure that pregnancy won't happen.
Abstinence
C. This contraceptive is used after sexual activity.
The pill
D. This method involves a vasectomy in males and a tubal ligation in females.