Which of the following best relates to the employment$-$at$-$will doctrine:

An employer is free to discriminate against employees based on their gender, race, religion or national origin

Highly paid skilled workers in building and construction trades can pass their jobs on to a family member when they retire

An employer can terminate an employee for any reason as long as the reason in not prohibited by law

A government employee usually loses his$/$her constitutional rights when on the job