Is unearned revenue classified as an asset account? or a liability

O C. his or her contribution to the organization.

Explanation:

A performance appraisal reviews an employee's job performance and overall contribution to a company.  It is also called an annual review, performance review or evaluation, or employee appraisal.  Performance appraisal provides feedback on each employee's performance, serves as a basis for modifying or changing work behavior, and provide data to managers with which they may judge future job assignments and performance.