单选题 The writer concludes that school rules to forbid smoking ______.

A、 should be introduced, for it really works at the school where he once studied
B、 should not be introduced, for it may cause disturbance
C、 should be introduced though it may not work effectively
D、 needn't be introduced as long as teachers don't smoke in front of children

【正确答案】 C

【答案解析】本题为细节推断题。文章最后一段说明，校方为防止学童染上抽烟的恶习的规定，不一定会获得预期的效果。