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  | 
