Major function of the National Labor Relations Board is to

1.monitor potentially inflationary increases in wages.
2.provide compulsory arbitration so that strikes and lockouts do not occur.
3.set annual wage increases on an industry-by-industry basis.
4.investigate and rule on charges of unfair labor practices by either management or unions.

4.investigate and rule on charges of unfair labor practices by either management or unions.

Explanation:

The National Labor Relations Board abbreviated NLRB is a federal agency that was founded by the United States Congress in 1935 to administer the National Labor Relations Act (NLRA). The National Labor Relations Board us responsive for safeguarding employees' rights such as they may need to organize in unfair employer treatment or wages. They also decide whether or not to have unions serve as their bargaining representatives with their employers

panem is a communist totalitarian dictatorship where all the resources and how they are allocated belongs to the capitol. the districts exist only to provide goods and services for the capital and most of the citizens live in poverty. it is a police state where the "peacekeepers" use force and threats to keep the people under control. dissent is outlawed and those who disobey the law are executed, flogged, or turned into avoxes. the games are another means in which the ruling elite in the capitol exert their power over the districts. when reading the books i drew parallels between panem and the soviet union and north korea. in no way is panem capitalist. the people in the capitol are wealthy but the majority of them are involved in the government somehow. it was the same way in the former soviet union where bigwigs in the communist party and high ranking government officials were given access to goods, services, medical treatments not available to the general public. if you think panem has a capitalist economy you need to brush up on your economics.  

the answer your looking for is c. : )