The correct answer is B) most union members belonged to the American Federation of Labor.
The statement that best describes the unionization of labor in the 1920s is “most union members belonged to the American Federation of Labor.”
The 1920s were complicated times for unions. Employers refused to raise wages due to the economic difficulties after World War 1. Many workers went on strike affecting important industries such as the Power industry that produced heat. US citizens did not like the idea and some feared that Communists were behind the strikes. That is why the American Federation of Labor had to defend itself against charges of disloyalty and radicalism.