Which statement is true about the hiring and employment process?

A job description permits employers to rely on the preferences of their customers as a reason for discriminatory employment practices.

A job specification should describe in detail the qualifications an employee needs, such as skills, marital status, religious beliefs, educational experience, appearance, and physical attributes.

According to common law, unless there is an explicit contractual provision to the contrary, every employment is employment $"$at will."

In validating job specifications, a firm typically lists all pertinent details about a job, including its duties, responsibilities, pros and cons, working conditions, list of all employees fired from the job during the past five years, the supervisor$$s demonstrated level of intelligence $($IQ$),$ and preferred political party affiliation for the job.

none of the above statements are correct.