175. Two new studies indicate that many people become obese more due to the fact that their bodies burn calories too slowly than overeating.

(A) due to the fact that their bodies burn calories too slowly than overeating

(B) due to their bodies burning calories too slowly than to eating too much

(C) because their bodies bum calories too slowly than that they are overeaters

(D) because their bodies bum calories too slowly than because they eat too much

(E) because of their bodies burning calories too slowly than because of their eating too much

答案给的是D，可是我不觉得这里几个选项有比较的意味啊？

是原因之间的的比较啊，主要以平行结构来判断选谁