[求助]GWD-TN-21 Q19

Sonya: The government of Copeland is raising the cigarette tax. Copeland’s cigarette prices will still be reasonably low, so cigarette consumption will probably not be affected much. Consequently, government revenue from the tax will increase.

Raoul: True, smoking is unlikely to decrease, because Copeland’s cigarette prices will still not be high. They will, however, no longer be the lowest in the region, so we might begin to see substantial illegal sales of smuggled cigarettes in Copeland.

Raoul responds to Sonya’s argument by doing which of the following?

A.     Questioning the support for Sonya’s conclusion by distinguishing carefully between no change and no decrease

B.     calling Sonya’s conc lusion into question by pointing to a possible effect of a certain change.

C.     Arguing that Sonya’s conclusion would be better supported if Sonya could cite a precedent for what she predicts will happen.

D.     showing that a cause that Sonya claims will be producing a certain effect is not the only cause that could produce that effect

E.     pointing out that a certain initiative is not bold enough to have the predicts it will have

The key is B. Could someone tell me why B not D? Thanks!

D 的意思是 原因A并不是导致结果B的唯一原因

而题目的意思是 原因A不仅能导致结果B,也能导致结果C

不知道为什么选D

B有质疑Sonya的话，Sonya的结论就是销售量不降，因而总体收入要增加；而Raoul指出虽然消耗量不太会下降，但是有黑市，所以质疑了government revenue from the tax will increase