Answer:
The correct option is (c)
Step-by-step explanation:
Labor unions are organizations that are formed for the betterment of workers. union help workers negotiate with employers with respect to wages, work hours and working conditions.
All the options except (c) are outcomes that are credited to unions as they are related to protection of workers from unfair treatment and living conditions. Work rules cannot be controlled by union. These are formed by the management and are ought to be followed by workers.