白勇语法求教

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

a. The rising of cost

b. Rising cost

c. The rising cost

d.Because the rising cost

e.Because of rising cost

答案为C，无异议。只是有个语法点想确认一下。

答案指出rise本身可作为名词，其名词形式不需要用the rising代替。那么是否此题修改成the rise of cost也是正确的呢？

谢谢各位啦~~

恩，清楚了，非常感谢~