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?
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ADuring 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.
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BThe one percent fall in cigarette sales in the year prior to tax increases was due to a smaller tax increase.
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CThe pretax price of a pack of cigarettes gradually decreased throughout the year before and the year after the tax increase.
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DFor 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.
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EAs the after-tax price of a pack of cigarettes rises, the pretax price also rises.
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显示答案
正确答案: D