英语 托福 tpo28 一道阅读题

英语 托福 tpo28 一道阅读题
（原文）
6.According to paragraph 2, what is the relationship between permeability andporosity?
A.The more pores a rock has, the higher its porosity but the lower its permeability.
B.Rocks with many internal spaces that are not connected with each other will have highporosity but low permeability.
C.If water flows through a rock easily, it has high permeability but low porosity.
D.Rocks that have high permeability have high porosity and vice versa.


据说由这两段可以退出答案选 B
但我真的找不到定位的句子 也实在不知道如何推断出的一个多一个少的这个关系 = =