Under the OWBPA, whBefore an employer is liable for discrimination under the ADA, which of the following must be proven? Grupo de opciones de respuesta The employee must first prove that they are qualified to perform the job in question. The employer must first prove that the employee is not qualified to perform the job in question. The employee must first prove that they have an impairment that substantially limits one or more major life activities. The employer must first prove that the employee has an impairment that substantially limits one or more major life activities.ch of the following is true? Grupo de opciones de respuesta The offer to older workers of additional money if they will sign a release and retire is illegal. A release signed by an employee over the age of 40 to give up a job is never enforceable. An employee has 30 days after the execution of a waiver to revoke it. If an employer is discharging a single employee, that employee must be given 21 days in which to consider the agreement