Which form of contraception may prevent a woman from becoming pregnant after she has discontinued its use for up to one year?
A) depo provera
B) oral contraceptive (birth control pill)
C) Norplant
D) intrauterine device (IUD)

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.