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T-9-Q4 In theyears following an eight-cent increase in the federal tax on a pack ofcigarettes, sales of cigarettes fell ten percent. In contrast, in the yearprior to the tax increase, sales had fallen one percent. The volume ofcigarette sales is therefore strongly related to the after-tax price of a packof cigarettes.
Theargument above requires which of the following assumptions?
A. Duringthe year following the tax increase, the pretax price of a pack of cigarettesdid not increase by as much as it had during the year prior to the taxincrease.
B. Theone percent fall in cigarette sales in the year prior to tax increases was dueto a smaller tax increase.
C. Thepretax price of a pack of cigarettes gradually decreased throughout the yearbefore and the year after the tax increase.
D. Forthe year following the tax increase, the pretax price of a pack of cigaretteswas not eight or more cents lower than it had been the previous year.
E. Asthe after-tax price of a pack of cigarettes rises, the pretax price also rises.
答案是d, 但是我没办法理解... | 
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发表于 2013-1-18 09:04:48
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