Which of the following is true of the Drug$-$Free Workplace Act of $1988?$

It requires that federal contractors and grant recipients satisfy certain requirements designed to eliminate the effects of illicit drugs from the workplace.

It provides protection to federal employees against drug testing at the workplace under all circumstances.

It requires that employers provide reasonable accommodation to employees who have successfully completed a rehabilitation program.

It mandates drug testing for all private$-$sector employees before they can be hired.