看了讨论，还是不懂.GWD7-27

yaoyao99

It means the members of the team.  Basically, the same people who worked on the first-time job and the rework.  

The paragraph talks about the difference between the first-time job and the rework, which is level of concentration, not level of compentency.  The only relevant choice is about who worked on those jobs.  If the same group of people worked on both jobs, then their level of compentency (does not change) and concentration (increased) can easily be compared.

E. Talks about repair jobs verses first-time jobs in general, whereas the paragraph focuses on the rationale for the improvements in the specific repair jobs.