理解这道题。。。但是想要个解释。。。 谢谢大家！！！！

小黛安

In the industrialized nations, the last century has witnessed a shortening of the average workday from twelve hours or longer to less than eight hours. Mindful of this enormous increase in leisure time over the past century, many people assume that the same trend has obtained throughout history, and that, therefore, prehistoric humans must have labored incessantly for their very survival.
We cannot, of course, directly test this assumption. However, a study of primitive peoples of today suggests a different conclusion. The Mbuti of central Africa, for instance, spend only a few hours each day in hunting, gathering, and tending to other economic necessities. The rest of their time is spent as they choose. The implication is that the short workday is not peculiar to industrialized societies. Rather, both the extended workday of 1880 and the shorter workday of today are products of different stages of the continuing process of industrialization.

10.    Which of the following, if true, would most greatly strengthen the argument made in the passage above?
(A) In recent decades, the economy of the Mbuti has been markedly affected by the encroachment of modern civilization.
(B) The life-style of the Mbuti is similar to that of prehistoric humans.
(C) The Mbuti have no words in their language to express the distinction between work activities and leisure activities.
(D) The workday of a European peasant in medieval times averaged between eleven and fifteen hours.
(E) The members of the Shaklik tribe in central Asia have an average workday of ten to twelve hours.

小黛安

自己顶一下~

billxxyy

我按照取非削弱的方法选的是b，自己也觉得有点问题，不过看了解释觉得b也有些道理。
After a lot of thought here is my reasoning for B (though Im not 100% about this)

The argument states that prehistoric people worked long hours but Mbuti men didn't. However this contrast is a bit unclear until it can be shown that Mbuti tribe had a similar lifestyle to prehistoric people. i.e. everything is similar between prehistoric people and Mbuti except the hours of work.

This would help conclude clearly that Mbuti are indeed an exception to the rule.
本题的结论是1880年和现在的工作时间都是工业不断发展的结果，理由是因为Mbuti人工作时间也短。B说的是Mbuti人跟其他史前人一样，取非就是Mbuti跟其他人不一样，那放到题目里的话由Mbuti人工作时间短推断出结论的这个逻辑就不成立了。所以B就加强了逻辑。

个人理解，如果错误请nn指正。

小黛安

哇塞，你很厉害！答案就是B!