[求助] CXD weaken 一题

lilyhuang

In a study of the effect of color on productivity, 50 of  100 factory workers were moved from their drab workroom to a brightly colored workroom. Both these workers and the 50 who remained in the drab workroom increased their productivity, probably as a result of the interest taken by researchers in the work of both groups during the study. Which one of the following statements seriouly weaken the argument?

（A）The 50 workers moved to the brightly colored room performed precisely the same manufacturing task as the workers who remained in the drab workroom.
(B) The drab workroom was designed to provide adequate space for at most 65 workers.
（C）The 50 workers who moved to the brightly colored workroom were matched as closely as possible in age and level of training to the 50 workers who remained in the drab work-room.
(D) Nearly all the workers in both groups had volunteered to move to the brightly bolored workroom.
(E) Many of the workers who moved to the brightly colored workroom reported that they liked the drab workroom as well as or better than they liked the brightly colored workroom.

不知道本句的前提是否是“probably as a result of the interest taken by researchers in the work of both groups during the study” ？ 结论是否是Both these workers and the 50 who remained in the drab workroom increased their productivity？哪位nn能给一些思路？ Many thanks.

cranberry

“Both these workers and the 50 who remained in the drab workroom increased their productivity”是实验的结果，结论是“probably...”,即对实验结果的原因分析。要削弱就要提出此分析的不足，或给出另外的原因。答案是否是B？

lilyhuang

U r right, the answer is B. 不过对它的分析感觉很奇怪：或许是研究过程中研究人员对两组工人的工作感兴趣的结果。在B中这间土褐色的房子最多容纳50个工人，移走50个剩下50个，每个工人的空间变大，所以工作效率提高。这可算是它因断桥吗？

cranberry

这个我说不好，我的理解就是它给出了文中以外的原因，那么如果这个原因成立，文中分析的原因自然就不成立。

lilyhuang

anyway, thank u very much.