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19911208

Which of the following, if true, would most weaken the author’s assertion that, in the 1970’s, corporate response to federal requirements
(lines 18-19) was substantial逻辑题：反对题（看数字）
(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*7E.

求解释，和思路