Sectionalisn The Missouri Compromise
States' Rights
The Kansas-Nebraska Act
The Election of 1860
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These topics would be most useful to a student who is writing a research report titled

d. direct

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.

demand is the need and oportunity to buy a given good or service.