Which of the following is an example of the government’s role in the factor market?

building roads
purchasing office supplies and computers
paying the salaries of government employees
purchasing buildings

The main role of the government in the factor market is to enact encouraging policies. The other factors take in employment determination, wages and labor supply. The government may likewise safeguard national security by not letting industries to handle with enemy republics and offering services that are not characteristically touched by reserved business. So the answer here is by paying salaries of the government employees.

Possess private property.