One effect of industrialization in the U. S. in the late 1800s was the organization of labor unions as a way for workers to gain bargaining power in the workplace. Why did this development often lead to violence? a) Union leaders required U. S. workers to join worldwide strikes
b) Union leaders would not negotiate with factory owners
c) Government officials used force to bring about better working conditions
d) Business owners used force to protect their workplaces from unionization