Even though the state has spent ten years and seven million dollars planning a reservoir along the
(A) will have to be abandoned as a result of the river becoming so heavily polluted
(B) is to be abandoned on account of the heavy pollution which the river received
(C) had to be abandoned because the river had received such heavy pollution
(D) has to be abandoned because of the river and its heavy pollution（E）
(E) must be abandoned because the river has become so heavily polluted
A错在哪里呢，as a result和result from有什么特殊的用法吗
abandon的原因是因为污染，而不是因为river.
E的意思更好。
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