Which statement is true about the hiring and employment process?

Question $28$ options:

$1)$

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

$2)$

A job specification describes the qualifications an employee needs, such as skills, educational experience, appearance, and physical attributes.

$3)$

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

$4)$

In validating job specifications, a firm lists all pertinent details about a job, including its duties, responsibilities, working conditions, and physical