OG104 kEY: (D.)
Spending on R&D by US businesses for 1984 showed an increase of about 8
percent over 1983 level. This increase actually continued a downward trend
evident since 1981-when outlays for R&D 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 R&D, did little or nothing to
stimulate such spending.
The conclusion of the argument above cannot be true unless which of the
following is true?
B. Business spending for research and development in 1985 cound not increase by more than 8.3 percent.
D. In the absense of the 25 percent tax credit, business spending for
R&D after 1981 would not have been substantially lower than it was.
E. Tax credits marked for specific investments are rarely effective in
including businesses to make those investments.
正确答案是D，我觉得是没有问题的，但是各位大侠能否帮忙解释一下B和E的意思，和为什么它们不是解。B我是没怎么看明白作者的意思，E是我觉得也是对的呀
