单选题 Many people of agencies disagree to the abstinence-only education NOT because

A、 the abstinence education has not been proven effective.
B、 the president is an advocate of abstinence-education program.
C、 abstinence programs have resulted in few short-term benefits.
D、 there was no significant change in the percentage of students sticking no sex after the abstinence education.

【正确答案】 B

【答案解析】细节题。[A]“禁欲教育还未被证明是有效的”是William Smith的反对意见，[C]“禁欲教育几乎没有收到短期效果”是AFY成员的反对意见；[D]“在接受禁欲教育之后，坚持不发生性行为的学生比例并没有变化”是举的一个反对禁欲教育的实例。而[B]“布什总统是禁欲教育的支持者”并不成为其他人或机构反对禁欲教育的理由，所以该项为正确选项。