6. A law requiring companies to offer employees unpaid time off to care for their children will harm the economic competitiveness of our nation’s businesses. Companies must be free to set their own employment policies without mandated parental-leave regulations.
Which of the following, if true, would most seriously weaken the conclusion of the argument above?
(A) A parental-leave law will serve to strengthen the family as a social institution in this country.
(B) Many businesses in this country already offer employees some form of parental leave.
(C) Some of the countries with the most economically competitive businesses have strong parental-leave regulations.
(D) Only companies with one hundred or more employees would be subject to the proposed parental-leave law.（C）
(E) In most polls, a majority of citizens say they favor passage of a parental-leave law.
此题，我选A，答案C
C答案：“有些经济竞争力强的国家有这条法规”，言下之意，“有些经济竞争力强的国家没有这条法规”，分明是向两个方向来论证此观点，怎么是削弱了呢？
例如：“今天广州有个重要的会，所以小王不应从上海到北京，而应去广州。”如何削弱？
答：“小王已经动身了。”
这个答案本身就是两个方向都可以嘛。。。。
A答案，作为他因削弱有误吗？
例如：“今天广州有个重要的会，所以小王不应从上海到北京，而应去广州。”如何削弱？
答：“小王的老婆今天从国外回北京”
如果这个答案有问题，那么是不是可以认为，削弱题的他因一定要瞄准于题目暗含的假设，也就是在不违背大前提下，而找到一个与暗含的假设相矛质的选项。
那么此题，正宗的削弱应该是“广州的那个会不重要！”
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