47．A study of marital relationships．n 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 l 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．
The answer is D. Can't understand it very well why A is wrong...
Many thanks!!!
D 指出原文因果倒置，非常强烈的削弱
A 说相同的睡眠习惯也肯能够导致婚姻破裂。我想你是不是看了新东方的教材说B非--〉C 他因削弱了
这道题目A选项有个occasionally ，减弱了削弱的力度。
一定要找most seriously weakens 的选项：）
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