请教一道语法题

pausa1087

1.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 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) reduces the amount of phosphates allowed for dumping by municipalities


此题大全上给出的答案是A。但在XDF上课的时候，说的答案是D。解释是政府行为决定与法令法规用一般现在时。想再确认一下。请NN指教，谢谢。

smalldan

这是og题，是选D

pausa1087

谢谢。