Answer:
Wars negatively affect relations between countries and usually do not resolve conflicts. World War 1 was not the war to end all wars as it was hoped as we experienced a Second World War.
Explanation:
The Oregon Trail was part of the idea of Manifest Destiny because of the fact that Manifest Destiny was the idea that America should expand into the Western land. hope this helps.
Answer:
C separation of powers.
Explanation:
Federalism is where the power for state and the federal government is divided. Separation of powers is the division of state and government powers in order to limit one side from the concentration of power. Checks and balances is where the state and government has regulations and certain powers specific to it's branch to prevent complete dominance. Judicial review is the supreme court declaring a legislation constitutional v. unconstitutional.