Final answer:
Most U.S. parents support a comprehensive sex education program in schools over abstinence-only education, as it is believed to be more effective in reducing unintended pregnancies and the spread of STIs.
Step-by-step explanation:
In the United States, the majority of parents support a comprehensive sex education program in schools, rather than abstinence-only education. According to national surveys, about 67 percent of Americans believe that education about safer sexual practices is more effective in reducing unintended pregnancies than abstinence-only education. Additionally, emphasizing safer sexual practices and contraception is considered a better way to reduce the spread of STIs than emphasizing abstinence.