请教语法

窗UID: 209565

13. The distinguishing feature of a fluid, in contrast to a solid, is the ease _____.
(A) that a deformed fluid
(B) to deform a fluid
(C) when a fluid that is deformed
(D) with which a fluid may be deformed
答案是Ｄ，为什么Ｂ不对呢

ray1893UID: 2156502

主语是distinguishing feature, 不能发出 to deform a fluid的动作，只能选D定语从句修饰ease