The correct answer is D) Represent the interests of workers in employment matters.
Step-by-step explanation:
Labor unions are organizations created by workers to defend and represent workers. Due to this, labor unions advocate for good and safe working conditions, appropriate payments and benefits, laws to protect workers, among others. This implies labor unions are necessary to improve working conditions and avoid employers from exploiting workers. Additionally, these organizations emerged during the First Revolution and have played an important role in the creation of laws and standards that favor workers. Thus, a labor union's role is to "Represent the interests of workers in employment matters".