How Can the Results of a Performance Evaluation Impact a Job

How can the results of a performance evaluation impact a job description?

A) Job descriptions are seldom updated, regardless of the performance evaluation results.
B) The evaluation may prove that the specifications on the job description attracted an over-competent employee.
C) The evaluation may prove that the specifications on the job description attracted an incompetent employee.
D) The job description may need to be updated if the specifications or performance standards are no longer valid.