Answer:
Union power
Step-by-step explanation:
The difference in wages is as a result of Union power because the North now belongs to a labor union that protects their interest. A labor union is an organization that plays the role of an intermediary between their members and their employers. The workers in the North through the union are able to negotiate for better wages. Through collective bargaining, the union gives workers In the North the power to request for better work pay than workers in the east, West and South facilities.