请教OG11逻辑124
124. Outsourcing is the practice of obtaining from an independent supplier a product or service that a company has previously provided for itself. Since a company's chief objective is to realize the highest possible year-end profits, any product or service that can be obtained from an independent supplier for less than it would cost the company to provide the product or service on its own should be outsourced.Which of the following, if true, most seriously weakens the argument?
(A) If a company decides to use independent suppliers for a product, it can generally exploit the vigorous competition arising among several firms that are interested in supplying that product.
(B) Successful outsourcing requires a company to provide its suppliers with information about its products and plans that can fall into the hands of its competitors and give them a business advantage.
(C) Certain tasks, such as processing a company's payroll, are commonly outsourced, whereas others, such as handling the company's core business, are not.
(D) For a company to provide a product or service for itself as efficiently as an independent supplier can provide it, the managers involved need to be as expert in the area of that product or service as the people in charge of that product or service at an independent supplier are.
(E) When a company decides to use an independent supplier for a product or service, the independent supplier sometimes hires members of the company's staff who formerly made the product or provided the service that the independent supplier now supplies.
答案选B，个人认为C也可以。解释里也没具体说C为什么不行。请教！ 题目说是要削弱因为要提高利润而把很多产品或者服务外包给第三方这个因果关系。应当考虑到提高利润这个果，但C跟利润没什么关系。
另外，看网上逻辑总结太多了，忘了是Lawyer还是哪个说过，一般普遍的，most people认为的，专家权威说的一般都错 C 只说一般情况下有些task outsource, 有些不。但是并没有说为什么不要outsource. 没有削弱 谢谢！！ 没明白
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