请教一道新powerprep 的难题

To meet the rising marketing 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 rasing 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

答案是D. 但是D中的比较明显不平行.

而这里我也只能选C, 尽管c的代词用的不好.

这里先多谢了

相比之下，只有选d了。

c的growing them有问题，them指代fish.逻辑意思有问题。

逻辑应该不会有问题的

To meet the rising marketing demand for fish and seafood, suppliers are growing fish twice as fast as growing them naturally

省略了主语而已啊.

注意明确naturally只能是修饰fish grow

此处的they是代fish,而非supplier

YES!

ok,知道了. 谢谢大家帮忙.

不过这种代词的用法还真是容易让人选错啊.