Compared to presidents of the 19th century, today's presidents are busier and have more power. Which of these is not one of the differences between
presidencies in these two eras?
A. Campaigns continue throughout presidential terms.
B. Presidents head the federal bureaucracy.
C. Presidents prepare the budget.
D. Presidents use mass media more often to engage with the public
and reach a wider audience.
E. Presidents have a larger staff to oversee.

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.

a widespread disease that killed many people

the split of the christian church

invasion from arab muslims