A Number of Leading Experts on Adolescent Sexuality Conclude That

A number of leading experts on adolescent sexuality conclude that abstinence-only programs

A) are less effective at reducing the risk of adolescent pregnancy than sex-education programs.
B) prevent adolescent pregnancies better than sex-education programs emphasizing contraceptive knowledge.
C) are more effective at reducing the risk of sexually transmitted infections than sex-education programs.
D) provide useful knowledge about safe sex to sexually active adolescents.