Correct answer choice is :
C) Skilled tradesmen
Explanation:
The Federation of Organized Trades and Labor Unions was established in 1881, and the American Federation of Labor was endowed five years later. Congress became more sensitive toward the labor force as time passed, which directed to the production of the Department of Labor. Labor unions were formed in order to help the workers with work-related problems such as low pay, unsafe or unsanitary working situations, long hours, and other situations. Workers usually had difficulties with their bosses as a consequence of membership in the unions.
