新prep 1 请赐教

To meet the rapidly rising market demand for fish and seafood, suppliers are growing fish twice as fast as their natural growth rate, cutting their feed allotment by nearly half and raising them on special diets.

(A) their natural growth rate, cutting their feed allotment

(B) their natural growth rate, their feed allotment cut

(C) growing them naturally, cutting their feed allotment

(D) they grow naturally, cutting their feed allotment

(E) they grow naturally, with their feed allotment cut

此题为什么选D呢，我觉D的they and their do not refer to the same thing------fish. They refers to the supplies; Their refers to fish.

我选的是C。  晕。。。。。。。。。请赐教

非常感谢caroline，我的两道题都是你解答的。可是这个题我还是不大明白，为什么they grow这里的they不可以指代suppliers？尽管不是和suppliers are growing完全对称，但是起码和 suppliers对称呀！ 不好意思麻烦了！