Research on Teen Employment by Mortimer and Colleagues Has Shown

Research on teen employment by Mortimer and colleagues has shown that

A) unskilled work has no impact on school engagement.
B) there is no difference in the effects of part-time or full-time work.
C) school performance declines dramatically for all types of work.
D) full-time work is better than part-time work.
E) jobs that teach useful skills increase teen confidence in his/her ability.