Craig Is Planning to Evaluate the Effectiveness of a Vocational

Craig is planning to evaluate the effectiveness of a vocational rehabilitation program. He wants to explore the proportion of clients who successfully obtain employment, as well as the duration in months that employment is maintained. Currently, the program serves 250 clients from a medium-sized metropolitan area. What is one thing that Craig can do to ensure that the evaluation appropriately incudes and represents some of the diversity of the metropolitan area?

A) Ensure measurement reliability and validity
B) Include all 250 clients in the evaluation
C) Determine how effective the program is for single-parents
D) Use an experimental method to negate issues of bias