The correct answer is: C. Job description.
A job description is a written statement of the essential duties, responsibilities, and qualifications required for a particular job. It is used to identify what the job holder does, how it is done, and why it is done.
A job specification is a document that outlines the knowledge, skills, and abilities required to perform a job. It is used to screen job applicants and to make hiring decisions.
Job evaluation is a process of determining the value of a job relative to other jobs in an organization. It is used to establish pay rates and to determine job classifications.
A job title is a brief name that identifies a job. It is used to refer to the job in job descriptions, job specifications, and other documents.