[求助]大全-Ⅰ-20

大全-Ⅰ-20.    A light bulb company produces 2,000 light bulbs per week. The manager wants to ensure that standards of quality remain constant from week to week. The manager, therefore, claims that out of 2,000 light bulbs produced per week, 500 light bulbs are rejected.

Of the following, the best criticism of the manager’s plan is that the plan assumes that

(A) light bulb manufacturers cannot accept all light bulbs that produced

(B) the overall quality of the light bulbs would not be improved if the total number of light bulbs produced were reduced

(C) each light bulb that is reviewed is worthy of being reviewed

(D) it is difficult to judge the quality of a light bulb（E）

(E) the 1,500 light bulbs that are accepted will be of the same quality from week to week

请问本题什么意思啊?为何A不对呢

It doesn't look like a typical gmat question to me. Where did you get it from? the question is odd: the best criticism of the manager’s plan is that the plan assumes that

isn't it the same as: what is the manager's assumption?

If I have to pick one answer, I will pick E.