The act that prohibits age-based employment discrimination against individuals between 40 and 70 years of age is the . [1] encourages arbitrary age discrimination in hiring, discharge, pay, term, conditions, or privileges of employment [2] discourages employment of older persons on the basis of their ability without regard to their age [3] prescribes arbitrary age discrimination in hiring, discharge, pay, term, conditions, or privileges of employment [4] promotes employment of older persons on the basis of their ability without regard to their age