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To evaluate a plan to save money on office-space expenditures by having its employees work at home, XYZ Company asked volunteers from its staff to try the arrangement for six months. During this period, the productivity of these employees was as high as or higher than before.
Which of the following, if true, would argue most strongly against deciding, on the basis of the trial results, to implement the company’s plan?
(A) The employees who agreed to participate in the test of the plan were among the company’s most self-motivated and independent workers.
(B) The savings that would accrue from reduced office-space expenditures alone would be sufficient to justify the arrangement for the company, apart from any productivity increase.
(C) Other companies that have achieved successful results from work-at-home plans have work forces that are substantially larger than that of XYZ.
(D) The volunteers who worked at home were able to communicate with other employees as necessary for performing the work.
(E) Minor changes in the way office work is organized at XYZ would yield increases in employee productivity similar to those achieved in the trial.
我觉得B，C，D都可以看做加强，但是OG却说他们都是无关的，
请牛牛指教，谢谢 | 
