Which of the Following Is True About Self-Appraisal, Where Ratings

Which of the following is true about self-appraisal, where ratings are done by the employee about themselves?

A) They allow the employee to have some input into the rating process.
B) They ensure that the employee thinks about their past performance.
C) They help supervisors remember the employee's accomplishments during the rating period.
D) All of the above are true.