[求助]prep2-49题目做对了,但是还想深究一个小问题

49.   (27096-!-item-!-188;#058&003405)

Since 1990 the global economy has grown more than it did during the 10,000 years from the beginning of agriculture to 1950.

(A) Since 1990 the global economy has grown more than it did during the 10,000 years from the beginning of agriculture

(B) Since 1990 the growth of the global economy has been more than that during 10,000 years, from when agriculture began

(C) The growth of the global economy since 1990 exceeds that which had been for 10,000 years from the beginning of agriculture

(D) The growth of the global economy since 1990 exceeds what it has been for 10,000 years, from when agriculture began

(E) The growth of the global economy since 1990 exceeds what it did for the 10,000 years from the beginning of agriculture

解释没有提到C,D,E选项应该用现在完成时的问题。可是我觉得既然有了since 1990这个时间状语，主句是不是应该用完成时呢？

也就是说如果C,D,E有哪个没有其他错误了，是不是也可以根据exceeds没有用完成时态来排除它？

谢谢谢谢！！！很小的一个问题，望NN解答

关于DE的解释：it 指代对象不清楚，it 指代“the growth of the global economy since 1990”有什么错误呢？

我认为“the growth of the global economy since 1990” 和“the growth of the global economy since 1990 （=it ）has been for ” 比较对象有逻辑问题？可以这样理解？

谢谢