John,the Supervisor of the Manufacturing Department,is in the Process of Evaluating

John,the supervisor of the manufacturing department,is in the process of evaluating his staff's performance.He has determined that 15% of the group will be identified as high performers,20% as above-average performers,30% as average performers,20% as below-average performers,and 15% as poor performers.John is using a(n) ________ method.

A) graphic rating scale
B) constant sum ranking scale
C) forced distribution
D) alternation ranking