What accounted for the formation and rise of the Congress of Industria

What accounted for the formation and rise of the Congress of Industrial Organizations (CIO)?

A) The desire in the American Federation of Labor to form an equal organization that catered to different workers.
B) The success of communists in infiltrating the labor movement.
C) The need for workers not admitted by the American Federation of Labor to have their own representative union.
D) The wiliness of major corporations who created the CIO to be a diversion against the tactics of the American Federation of Labor.

ANSWER
Answer: C