17. Companies considering new cost-cutting manufacturing processes often compare the projected results of making the investment against the alternative of not making the investment with costs, selling prices, and share of market remaining constant.
Which of the following, assuming that each is a realistic possibility, constitutes the most serious disadvantage for companies of using the method above for evaluating the financial benefit of new manufacturing processes?
(A) The costs of materials required by the new process might not be known with certainty.
(B) In several years interest rates might go down, reducing the interest costs of borrowing money to pay for the investment.
(C) Some cost-cutting processes might require such expensive investments that there would be no net gain for many years, until the investment was paid for by savings in the manufacturing process.
(D) Competitors that do invest in a new process might reduce their selling prices and thus take market share away from companies that do not.
(E) The period of year chosen for averaging out the cost of the investment might be somewhat longer or shorter, thus affecting the result.
看过前面的讨论帖了，可是仍然想破头也没有想明白…… 首先，既然要在 costs, selling prices, and share of market 这三个方面比较两个项目的结果，那这三个因素又怎么可能remain constant呢？ 其次，撇开上面这个疑问不说，如果像有些前辈们说的那样，原文忽视了这三个因素会变化，所以包含了变化的D答案起到了weaken作用，可是B不是也包含了变化吗？costs下降了呀~~ 再次，如果按照这样的思路理解，那么C、E又是怎么与原文无关或者support的呢？ 哭求NN解答! | 
