The predecessor to the AFL was the

A) Teamsters Union.
B) Knights of Labor.
C) CIO.
D) International Workers of the World.

AFL

The American Federation of Labor, a national federation of labor unions in the United States.

Knights of Labor

The Knights of Labor was a significant labor organization in the United States during the late 19th century, advocating for the rights of workers and seeking to improve their conditions.

CIO

Chief Information Officer, a senior executive responsible for the management, implementation, and usability of information and computer technologies within an organization.