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[求助] CXD weaken 一题
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.
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