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题库 / GMATLA-CR-70
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.
The argument above assumes which of the following?
There is no systematic difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs.
There is no company that successfully competes with Ace Repairs for complex repair jobs.
Ace Repairs' warranty is good on first-time jobs but does not cover rework jobs.
Ace Repairs does not in any way penalize mechanics who have worked on complex repair jobs that later had to be reworked.
There is no category of repair jobs in which Ace Repairs invariably carries out first-time jobs satisfactorily.
结论：是专心的程度导致返修比第一次修的成果令人满意
A：返修和第一次修的工人之间没有等级上的差距，如果有，可能单纯是因为第一次修的人是菜鸟，返修的人是老手导致满意度的差异，跟专心程度无关；如果没有，排除了他因；
B：无关
C：无关
D：in any way无论如何都会惩罚返修的工人，说明是他因导致，weaken
E：无关
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