(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(A)
(E) reduces the amount of phosphates allowed for dumping by municipalities这是OG11给出的解释:
Since the dumping continues into the present, the past perfect verb "had
been allowed" should instead be the present "are allowed".
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