Match each statement with the type of contraceptive it describes. a. this is the most effective method. it is the only way to ensure that pregnancy won't happen. diaphragm b. this contraceptive is a flexible plastic cup that is inserted before sexual activity. sterilization c. this method involves a vasectomy in males and a tubal ligation in females. abstinence d. this contraceptive is inserted under the skin of a woman's upper, inner arm. impla