Final answer:
Oral contraceptive pills are the best option for a female college student looking to prevent ovulation and achieve up to 99% effectiveness in preventing pregnancy. The IUD is also highly effective and reversible, but does not primarily prevent ovulation.
Step-by-step explanation:
For a female college student seeking a birth control option that inhibits ovulation and offers up to 99% effectiveness, oral contraceptive pills (OCPs) should be given the strongest consideration. These pills contain hormones that effectively prevent ovulation when taken as directed. Although the Intrauterine device (IUD) is also highly effective and reversible, it does not function primarily by preventing ovulation but rather by creating an environment that is inhospitable for sperm and, in the case of hormonal IUDs, may also prevent the lining of the uterus from supporting a pregnancy. Behavioral methods such as coitus interruptus and natural family planning do not provide the same level of effectiveness as OCPs or IUDs and therefore are less suitable for someone who desires high effectiveness in preventing pregnancy.
11. Ordered by typical effectiveness from least to most effective: fertility awareness method, coitus interruptus, male condom, birth control pill, IUD.
12. A contraceptive method with a 35 percent failure rate would not be considered highly effective. In fact, it falls short of the effectiveness required to be recommended for individuals seeking reliable birth control.
18. The most effective reversible method of contraception is the C. intrauterine device (IUD).