M-4-17. One state adds a 7 percent sales tax to the price of most products purchased within its jurisdiction. This tax, therefore, if viewed as tax on income, has the reverse effect of the federal income tax: the lower the income, the higher the annual percentage rate at which the income is taxed.

The conclusion above would be properly drawn if which of the following were assumed as a premise?

(A) The amount of money citizens spend on products subject to the state tax tends to be equal across income levels.

(B) The federal income tax favors citizens with high incomes, whereas the state sales tax favors citizens with low incomes.

(C) Citizens with low annual incomes can afford to pay a relatively higher percentage of their incomes in state sales tax, since their federal income tax is relatively low.

(D) The lower a state’s sales tax, the more it will tend to redistribute income from the more affluent citizens to the rest of society.（A）

(E) Citizens who fail to earn federally taxable income are also exempt from the state sales tax.

先是有阅读问题；the lower the income, the higher the annual percentage rate at which the income is taxed. 这个影响是the state sales tax 还是federal tax的？

请问答案D为什么错？

这题的逻辑关系，请大侠们给我仔细分析一下来龙去脉，可以吗？谢谢！

两个税把我搞晕了

虽然我的逻辑不灵但还是愿意和你一起看看这题.

这题是这样的,你以后看到要求找assumption的题首先记着两点:１　找ｎｏｔ的答案　２　用取非法检验．

这题就说州税增加了购物税，如果这也算做收入税的一部分，就反对了联邦的收入税方针－－收入少，收入税就应该少．　而这样增加购物税的结果就成了收入越少，收入税越高．

言下之意就是认为那些子穷人不会比富人买的东西少（和购物税挂钩）