求助一道PREP题，谢谢大家啦！！！

36.   (32124-!-item-!-188;#058&006025)

Outsourcing is the practice of obtaining from an independent supplier a product or service that a company has previously provided for itself.  Vernon, Inc., a small manufacturing company that has in recent years experienced a decline in its profits, plans to boost its profits by outsourcing those parts of its business that independent suppliers can provide at lower cost than Vernon can itself.

Which of the following, if true, most strongly supports the prediction that Vernon's plan will achieve its goal?

(A) Among the parts of its business that Vernon does not plan to outsource are some that require standards of accuracy too high for most independent suppliers to provide at lower cost than Vernon can.

(B) Vernon itself acts as an independent supplier of specialized hardware items to certain manufacturers that formerly made those items themselves.

(C) Relatively few manufacturers that start as independent suppliers have been able to expand their business and become direct competitors of the companies they once supplied.

(D) Vernon plans to select the independent suppliers it will use on the basis of submitted bids.

(E) Attending to certain tasks that Vernon performs relatively inefficiently has taken up much of the time and effort of top managers whose time would have been better spent attending to Vernon's core business.

我选了A，请问A为什么不对，E是如何支持的？？

Conclusion:  Outsourcing certain parts (that independent suppliers can
provide at lower cost than Vernon can itself) => boost its profits

                      {A+B' < C (total cost)}

In general, the assumption is B = B'.  For this question, the assumption is "After outsourcing, Vernon can still get parts at the quality same to or better than before."   So key to this argument is to realize that the outsourcing suppliers can provide the high quality part that Vernon wanted. Note: From the argument, we know that oursourcing parts are cheaper.

(E) just point out that outsourcing provide good part.  (It is tricky. It does not mention directly, but it say that "Attending to certain tasks that Vernon performs relatively inefficiently" which indicate that outsourcing suppliers can do the same job more efficiently.)

(A) just nothing to do with the assumption.

You can simplify the whole argument to one sentence.

If outsourcing can provide cheaper parts at the same quality, then the total cost will lower.

本题的中心是　oursourcing能够减小Ｖernon的成本,增加它的收益

Ａ选项提供的信息只描述了不能oursource的部门的特点 与decline costs or boost profits无关

E选项给出outsource的一个作用,减少相对无用功，增加在相对高效的核心业务上花费的时间和精力，达到目的