og175 more...than...

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

看不出句子中的more X than Y结构啊？too...than...也可以用作比较句式么？请NN帮忙啊！谢谢先