Question

which is the most effective contraceptive method at preventing pregnancy?
diaphragm
abstinence
iud
oral contraceptive

Explanation:

Abstinence from sexual activity completely eliminates the chance of pregnancy, making it the most effective contraceptive method. Other methods like diaphragm, IUD, or oral contraceptives still have a small failure rate due to various factors (e.g., improper use, device failure), but abstinence has a theoretical 0% pregnancy rate when practiced consistently.

Answer:

B. abstinence