语法问题，请英雄相助！！

1.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

     怎么感觉选不出来对的，答案是d

D 是 the ease 的定从

2.Unique (among) bivales, scallops swim extremely (well), propelled by jets of water expelled while (snapped) the (shut).  

   答案是c，c的确是有问题，'snapping' is correct.    但我觉得a也有问题阿，among不是用在三者或三者以上的吗？'bivales' can be 3 or more than 3.

3.Acclimatization is (the process) by which an organism adjusts (to living)in an environment (to) which (it  is  normally) unsuited.

答案是d,？？

4.The planets far from the Sun are (so remote from) any heat (source) that their temperatures are (thought) to be (much near) absolute zero.

答案是d.??

here are correct expressions;

almost near (to) absolute zero.

much nearer (to) absolute zero

the nearest absolute zero.