问题详情

According to the passage, which of the following factors does NOT help improve digestion？

A．More calories provided by meat-based diet.

B．Increased softness of food which reduces the energy needed to digest.

C．Bacteria contained in large intestine.

D．Starch and protein molecules being made easier to break down.

请帮忙给出正确答案和分析，谢谢！