What role do government agencies play in a mixed market economy?
They run shipping companies and other sources of distribution.
They own farms, factories, and other sources of production.
They regulate some aspects of production and distribution.
They employ most of the workers in the economic system.

They regulate some aspects of production and distribution.

Explanation:

In the mixed market economy, the government's main role is to :

- ensure that the competition among the private sectors occur fairly

- Ensure the protection of every citizens from the economic competition.

In order to do this, the government need to regulate several aspects of the business. For example :

- The government can ban several materials from being used in production if we have enough proof that the materials will be dangerous for Customers.

- The government cold also create a regulation regarding minimum-wage and maximum working hours in order to ensure that the workers are treated fairly.

health care plans in the united states having high costs because they are focusing on providing quality programs for different groups of individuals. the quality of the service is based on money flow received from the members. without this investment, couldn't be possible a constant scientific searching to prevent death and illness caused because of low levels of health investigation. currently, the complaints are not about the highest cost, but about the coverage and benefits to access the necessary health services required by the members.  

besides, if a global health system is established the quality levels will fall down because of the standardized of the health. the access to care will increase but the quality will be low because it depends on the money invested.