大家看看这道题答案是不是不对啊

dadu91418

题目：
a study of marital relationships in which one parner's sleeping and waking cycles differ from those of the other partner reveals that such couples share fewer activities with rach 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 marrige.

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 marrige.

B.     people in unhappy marriges have been found to express hositility by adopting a different sleeping and waking cycle from yhat of their spouse.




我觉得选a.     可是答案是d.     想不明白啊头疼

ivyxiaoxiao

这是一道用因果颠倒来削弱的题目。
题干中结论是：mismatched sleeping and walking cycles --> seriously jeopardize a marrige.

而B选项中是表明: unhappy marriage-->different sleeping and walking cycle.