[CR. ] TN-13-Q4
Q. 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.
答案是D
卻是看不明白怎麼推出的假設@@
是根據什麼咧?
還請板友幫忙解答
謝謝
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