Unions limit the operation of:

A. democracy
B. the justice system
C. market forces
D. the military

None of the above.

c. market forces

To determine the answer to this question, we need to understand the purpose and role of unions and how they impact different sectors.

Unions are organizations formed by groups of workers to represent their collective interests and negotiate with employers on matters such as wages, working conditions, and benefits. Their primary goal is to protect and advance the rights and welfare of workers.

Now, let's evaluate each option to see if unions limit their operations:

A. Democracy: Unions themselves are not designed to limit democracy. In fact, they often uphold democratic principles by advocating for workers' rights and allowing individuals to collectively bargain for better working conditions. Therefore, unions do not limit democracy.

B. The Justice System: Unions do not have direct influence over the justice system. They may engage in legal processes or seek legal remedies in cases of workplace disputes, but their impact on the broader justice system is limited. Thus, unions do not limit the justice system.

C. Market Forces: Unions can affect market forces to some extent by negotiating better wages and benefits for workers. This may lead to increased costs for employers, potentially impacting prices or competition in the market. However, it's important to note that unions play a vital role in ensuring fair wages and working conditions, which can contribute positively to the overall economy. Therefore, while they may influence market forces, it wouldn't be accurate to say that unions limit market forces entirely.

D. The Military: Unions typically do not have a direct impact on the military. The military operates under a separate framework and has its own system of organization, employment, and labor relations, which may differ from those of civilian workplaces. Thus, unions generally do not limit the military's operation.

Considering the above analysis, the correct answer is C. Unions may influence market forces, but they do not completely limit their operation.