Ken Wants His Managers to Be Better Evaluators of His

Ken wants his managers to be better evaluators of his employees. Toward this end, he can do all of the following except

A) rely on one evaluator who is shown to be objective for all employees.
B) train his managers to sharpen their memory skills.
C) teach managers to focus attention on job-relevant behaviors.
D) minimize the time between employee performance and performance evaluation.