求助GWD20中一题,没有讨论过。。。

Q27:

A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company’s warranty.  The reworked jobs are invariably satisfactory.  When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.

A.      There is no systematic有规则的，彻底的 difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs.

B.       There is no company that successfully competes with Ace Repairs for complex repair jobs.

C.      Ace Repairs’ warranty is good on first-time jobs but does not cover rework jobs.

D.      Ace Repairs does not in any way penalize
                处于不利地位mechanics who have worked on complex repair jobs that later had to be reworked.

E.       There is no category of repair jobs in which Ace Repairs invariably carries out first-time jobs satisfactorily.

各位同学，E为什么不能选？为什么要选A?原文最后不是说了rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.这个不是策略吗？非常感谢！