Answer:
The correct answer is: 10 years.
Explanation:
Almost after ten (10) years after World War II (WWII) ended, the American Federation of Labor (AFL) and the Congress of Industrial Organizations (CIO) joined forces in 1955 under union leader John L. Lewis command. This was mainly caused because of the increase in the number of unions by that year that included law enforcement officials, health care employees, and postal office workers.
