Which of the following refers to job evaluation?

A) determining how well a job is performed
B) surveying the market
C) ranking all jobs according to their value to the firm
D) establishing the skill level of each employee

Job evaluation is the process of ranking all jobs according to their value to the firm. It involves identifying and analyzing the duties and responsibilities of each job and determining its relative worth within the organization's hierarchy. The aim of job evaluation is to establish a fair and objective system for determining the pay and other rewards for each job, based on its value to the organization. The other options (A, B, and D) are related to performance appraisal, market analysis, and skills assessment, respectively, but not to job evaluation specifically.