8.     The rising of costs of data-processing operations at many financial institutions has created a growing opportunity for independent companies to provide these services more efficiently and at lower cost.

(A) The rising of costs

(B) Rising costs

(C) The rising cost

(D) Because the rising cost

(E) Because of rising costs

答案是c

为什么A不对呢，感觉A更合适阿，是the rising 造成的opportunity,而不是cost.

   另外cost 是“价格“的意思，而costs是“成本“的意思，data-processing operations 的成本上涨,而不能说是operation 的价格上涨阿。

   另外cost 是“价格“的意思，而costs是“成本“的意思，data-processing operations 的成本上涨,而不能说是operation 的价格上涨阿。

   另外cost 是“价格“的意思，而costs是“成本“的意思，data-processing operations 的成本上涨,而不能说是operation 的价格上涨阿。

    请NN给解答一下啊，多谢了！

谓语动词是has ， 所以要用单数的主语形式；A是复数形式

Please refer to:

OG_10th-052
XDF Section 7-008
OG 11th_Verbal_008

为什么不能理解为价格呢？

“由于financial institutions 提高data-processing operations 服务的价格，给很多小company创造了机会，低价单独提供此项服务”，句意也很通顺。

rising在此处应该是现在分词做定语，表示所修饰名词的动作。希望NN出来指正

参见rise在朗文的解释，其中有rising的例子：

rising crime/unemployment/inflation etc

The country now faces economic recession and rising unemployment.

The police seem unable to cope with the rising tide of (=large increase in) car crime.

大全中也有很多例子

（987-24)     A recent study has found that within the past few years, many doctors had elected early retirement rather than face the threats of lawsuits and the rising costs of malpractice insurance.

(A) had elected early retirement rather than face

(B) had elected early retirement instead of facing

(C) have elected retiring early instead of facing

(D) have elected to retire early rather than facing（E）

(E) have elected to retire early rather than face