题目选项分析

When a married couple has frequent emotionally satisfying conversations, they tend in overwhelming percentages to remain married throughout their lives. Queen Melinda and Prince Jonathan, Duke of Westphalia, have been married for over sixty years, so clearly they must have emotionally satisfying conversations all the time.

This argument is most vulnerable to what criticism?

【选项】It takes a condition to be the effect of something that has happened only after the condition already existed.