The combination birth control pill works by preventing

Approximately what percent of successful suicides are committed by boys rather than girls?

A) 55 B) 65 C) 75 D) 85

Sixteen-year-old Mark is from Texas and 17-year-old Darryl is from Alberta, Canada. Which of the following statements about the likelihood of each sexually active teen contracting AIDS or another sexually transmitted disease (STD) is true?

A) Mark is less likely than Darryl to contract AIDS, but more likely to contract another STD. B) Mark is more likely than Darryl to contract AIDS or another STD. C) Mark is less likely than Darryl to contract AIDS or another STD. D) Mark is more likely than Darryl to contract AIDS, but less likely to contract another STD.