T-13-Q4 哪位好心人能给我讲讲这个题啊...

geniealice

In the years 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.
The argument above requires which of the following assumptions?

A.During the year following the tax increase, the pretax price of a pack of cigarettes did not increase by as much as it had during the year prior to the tax increase.B.The one percent fall in cigarette sales in the year prior to tax increases was due to a smaller tax increase.
C.The pretax price of a pack of cigarettes gradually decreased throughout the year before and the year after the tax increase.
D.For the year following the tax increase, the pretax price of a pack of cigarettes was not eight or more cents lower than it had been the previous year.
E.As the after-tax price of a pack of cigarettes rises, the pretax price also rises.

能详细跟我说说A和D的区别么... 万分感谢!

perain

恩 在A和D中徘徊了一下，决定选D。 D选项中说明了具体数字，更精确一些。