Why does free condom distribution at school increase teenage pregnancy?

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问题 Why does free condom distribution at school increase teenage pregnancy?
Giving out free condoms at school is not a surefire way to avoid teenage pregnancy — or it might not be enough. Access to condoms in schools increases teen fertility rates by about 10 per cent, according to a new study by the University of Notre Dame.
   However the increase happened in schools where no counseling was provided when condoms were given out — and giving out guidance as well as birth control could have the opposite effect. Access to other kinds of birth control, such as the contraceptive pill, IUDs and implants, has been shown to lower teen fertility rates — but condoms might have opposite consequences due to their failure rate as well as the time and frequency at which they’re used.
   Most of the free condoms programs began in 1992 or 1993 and about two thirds involved mandatory counseling. The 10 per cent increased occurred as a result of schools that gave out condoms without counseling.
   Teenage girls were also more likely to develop gonorrhea when condoms were given for free. Access to contraceptives in general has been shown to lower teen fertility, or in some cases had no effect at all.
   But condoms might have a different impact because of several factors, such as the fact that their failure rate is more important than that of other contraceptives.

选项 A、There are not enough free condoms.
B、No counseling was provided.
C、It has the opposite effect.
D、It is not a surefire way.

答案B

解析 本文主要讨论了校园免费发放避孕套引起青少年怀孕率上涨的原因,在开篇时指出第一个原因,也是主要原因,即免费发放避孕套的同时,未提供咨询服务。A选项是对原文“or it might not be enough”的误读。原文认为仅仅发放避孕套还不够,还应该有配套措施,而不是发放的避孕套数量不够。C、D选项与题干意思相同,讨论结果,不是原因。
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