请教NN OG-104

xin_bj

104. Spending on research and development by United States businesses for 1984 showed an increase of about 8 percent over the 1983 level. This increase actually continued a downward trend evident since 1981 - when outlays for research and development increased 16.4 percent over 1980 spending. Clearly, the 25 percent tax credit enacted by Congress in 1981, which was intended to promote spending on research and development, did little or nothing to stimulate such spending.

The conclusion of the argument above cannot be true unless which of the following is true?

( A) Business spending on research and development is usually directly proportional to business profits.
( B) Business spending for research and development in 1985 could not increase by more than 8.3%.
( C) Had the 1981 tax credit been set higher than 25%, business spending for research and development after 1981 would have increased more than it did.
( D) In the absence of the 25% tax credit, business spending for research and development after 1981 would not have been substantially lower than it was.
( E) Tax credits market for specific investments are rarely effective in inducing businesses to make those investments.

答案是D，麻烦哪位NN给解释一下。

iselibra

题目的意思就是问assumption。
给出的条件是增长率年年下降，结论是政府的刺激没用。
所以前提就是，就算政府没给出这个刺激，情况一样不会比现在差。

xin_bj

明白！
谢谢，iselibra！！

KATIEUS

EXACTLY

FlowerJay

这道题让我想起了那个有税没税的。题目说有税降低就业率，WEAKEN答案说没税降低就业率。很像的