求助一道语法题目

guoguo463

A 1972 agreement between Canada and the United States
                    reduced the amount of phosphates that municipalities had been allowed to dump into the Great Lakes.

(a) reduced the amount of phosphates that municipalities had been allowed to dump

(b) reduced the phosphate amount that municipalities had been dumping

(c) reduces the phosphate amount municipalities have been allowed to dump

(d) reduced the amount of phosphates that municipalities are allowed to dump

(e) reduced the amount of phosphates allowed for dumping by municipalities

ＯＧ的答案是D，而LZM的答案是A，我个人更倾向A，你们认为是哪个答案呢？

谢谢：）

nancywang2001

A 1972 agreement between Canada and the United States
                    reduced the amount of phosphates that municipalities had been allowed to dump into the Great Lakes.

(a) reduced the amount of phosphates that municipalities had been allowed to dump

(b) reduced the phosphate amount that municipalities had been dumping

(c) reduces the phosphate amount municipalities have been allowed to dump

(d) reduced the amount of phosphates that municipalities are allowed to dump

(e) reduced the amount of phosphates allowed for dumping by municipalities

如果是D的话,:

因为这个是"AGREEMENT"里的条款,所以应该用一般时态.

对吗?

graceyin7

用D的時態，原因是句子描述的是事實，所以用現在簡單式。

mbz

og makes a mistake.

The logical meaning of D is wrong.

graceyin7

D is logically valid.