The Chief Disadvantage of Group Plans Is That

The chief disadvantage of group plans is that

A) each worker's rewards are no longer based just on his/her own efforts.
B) a group incentive is problematic when conflict arises between group members.
C) a group incentive may not prove as effective as an individual incentive plan in improving performance.
D) each worker sees his or her effort leading to the desired reward.
E) a group incentive does not facilitate on-the-job training.