求大神指教！Must be true题！

杜杜杜97

115. Many people argue that tobacco advertising plays a crucial role in causing teenagers to start or continue smoking. In Norway, however, where there has been a ban on tobacco advertising since 1975, smoking is at least as prevalent among teenagers as it is in countries that do not ban such advertising.

Which of the following statements draws the most reliable conclusion from the information above?

(A) Tobacco advertising cannot be the only factor that affects the prevalence of smoking among teen-agers.

(B) Advertising does not play a role in causing teenagers to start or continue smoking.

(C) Banning tobacco advertising does not reduce the consumption of tobacco.

(D) More teen-agers smoke if they are not exposed to tobacco advertising than if they are. A

(E) Most teen-agers who smoked in 1975 did not stop when the ban on tobacco advertising was implemented.

为什么B不可以呢？题干第一句说了“crucial role”，第二句“however”不是正好反驳它吗

Bensontuo

Spot the question type: Must be true

Well, apparently, what the questions said is that smoking is not the only reason behind to prevent teenagers from smoking.

The reason why B is not the right answer is because you do not know whether it does not or it does, which is to say, it is could be true or could not be true question type.

yanhuan0529

这个however并不是反驳crucial role的啊，而是说ban advertising, 然而并不比其他国家的少。