关于express hostility的一道题

47.  A study of marital relationships in which one partner's sleeping and waking cycles differ from those of the other partner reveals that such couples share fewer activities with each other and have more violent arguments than do couples in a relationship in which both partners follow the same sleeping and waking patterns. Thus，mismatched sleeping and waking cycles can seriously jeopardize a marriage．

Which of the following，if true，most seriously weakens the argument above?

(A)  Married couples in which both spouses follow the same sleeping and waking patterns also occasionally have arguments that can jeopardize the couple's marriage．

(B)  The sleeping and waking cycles of individuals tend to vary from season to season．

(C)  The Individuals who have sleeping and waking cycles that differ significantly from those of their spouses tend to argue little with colleagues at work．

(D)  People in unhappy marriages have been found to express hostility by adopting different sleeping and waking cycles from those of their spouses。

(E)  According to a recent study, most people's sleeping and waking cycles can be controlled and modified easily．

这里D中的express hostility是什么意思?我的理解是夫妻因为要接纳对方睡眠问题的事情而表达敌意,应该是SUPPORT啊,请人帮忙分析下,另E为什么错?我觉得它可以说明这个睡眠问题并不SERIOUS

D的意思是说，adopting different sleeping and waking cycles from those of their spouses是夫妻婚姻unhappy 的一种表达方式（express hostility ），把原文的因果倒置过来了，因此weaken.

E好像和原文的论述过程没有关系，并没有涉及到marriage和sleeping and waking cycles 的关系。

谢谢！

D选项弄明白啦

E选项中marriage和sleeping and waking cycles 应该是有关系的吧。原文中最后一句是Thus，mismatched sleeping and waking cycles can seriously jeopardize a marriage．

这个有点不清楚，有人指点下吗？