prep逻辑题求教

Evelyn乐儿

In the year following an eight-cent increase in the federal tax on a pack of cigarettes, sales of cigarettes fell ten percent.  In contrast, in the year prior to the tax increase, sales had fallen one percent.  The volume of cigarette sales is therefore strongly related to the after-tax price of a pack of cigarettes.  

Which of the following, if true, would most strengthen the argument above?

A. During the second year after the tax increase, cigarette sales increased by a significant amount.

B. The information available to consumers on the health risks of smoking remained largely unchanged in the period before and after the tax increase.

C. Most consumers were unaware that the tax on cigarettes was going to increase.

D. During the year following the cigarette tax increase, many consumers had less income, in inflation-adjusted dollars, than they had had in the previous year.

E. During the year after the tax increase, there was a greater variety of cigarettes on the market than there had been during the previous year.
答案给的是B，我想选D。。。求解释。。。感激不尽

Evelyn乐儿

个人看法哈：

逻辑链：加税以后cigarettes的sales下降→sales的量和税后cigarettes 的价格有关。问加强

B选项：顾客得知吸烟危害的信息没变。说明不是因为顾客看了吸烟危害的信息，有意识的不去买cigarettes导致它的sales下降。排除他因，加强。
D选项：加税后的那年，顾客的收入减少。说明顾客不是因为香烟上涨的价格不去买，而是因为收入减少不能买。削弱。

-- by 会员 reebe (2012/4/5 11:25:36)

茅塞顿开啊~谢谢

reebe

个人看法哈：

逻辑链：加税以后cigarettes的sales下降→sales的量和税后cigarettes 的价格有关。问加强

B选项：顾客得知吸烟危害的信息没变。说明不是因为顾客看了吸烟危害的信息，有意识的不去买cigarettes导致它的sales下降。排除他因，加强。
D选项：加税后的那年，顾客的收入减少。说明顾客不是因为香烟上涨的价格不去买，而是因为收入减少不能买。削弱。