Sentence Correction (SC) | QOTD: A 1972 agreement between Canada and the United States

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

(A)reduced the amount of phosphates that municipalitieshad been allowed to dump
(B)reduced the phosphate amount that municipalities had been dumping (C)reduces the phosphate amount municipalities have beenallowed to dump
(D)reduced the amount of phosphates that municipalitiesare allowed to dump
(E)reduces the amount of phosphates allowed
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