小安阅读第一篇 讲minority-owned businesses面对risk的，求指教

eliane小小爱

还是这篇文章，第七题
7.Which of the following, if true, would most weaken the author’s assertion that, in the 1970’s, corporate response to federal requirements was substantial

(A) Corporate contracts with minority-owned businesses totaled $2 billion in 1979.
(B) Between 1970 and 1972, corporate contracts with minority-owned businesses declined by 25 percent.
(C) The figures collected in 1977 underrepresented the extent of corporate contracts with minority-owned businesses.
(D) The estimate of corporate spending with minority-owned businesses in 1980 is approximately $10 million too high.（E）

(E) The $1.1 billion represented the same percentage of total corporate spending in 1977 as did $77 million in 1972.
今天这篇文，我上下午各做了一遍，结果依次选了C、B，就是没选E。。。看不懂。。求最近在做小安阅读的童鞋指导下吧。。。拜托哦，谢谢！

eliane小小爱

哇哦，谢谢你teddybearj4，解释的非常非常清楚，我懂了，话说逻辑我还没开始复习。。。嘿嘿，偶还有一题。。。不懂，也是这一篇的，http://forum.chasedream.com/GMAT_RC/thread-741619-1-1.html，如果你有时间就帮俺看一下顺便解答下吧。。。我没搜到小安81篇的具体解释，，，不然就可以自己研究了。。。

eliane小小爱

我是担心最后复习RC，靠突击我的成绩提不上来，所以每天坚持练一两篇。嘿嘿，还是谢谢你的建议哦，我目前在复习语法，下一步是逻辑.