The purpose of both the truman doctrine and the marshall plan was to

The purpose of both the Truman Doctrine and the Marshall Plan was to (3) prevent the spread of communism.

Explanation:

The Truman Doctrine used the the containment policy, so that the United States could support any nation with both economic and military aid if needed if its ability was threatened by Communism or the Soviet Union. The Marshall Plan was an initiative from the United States to Europe, which was economic support to help rebuild European economies after World War II.

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the answer to number 5 is fort sumter

for the 2 countries u can do china and america because america has a democratic government while china has a communist government.

a democracy is a government run by the people either by directly voting or indirectly by electing representatives. an oligarchy is a government run by a few or a small group of people. a democracy and oligarchy are similar because both in an oligarchy and an indirect democracy, a small group of induvial determine the laws for a large group of people they are different because in an oligarchy it is easier to control and they do not have to answer to a large number of people in the country, unlike a democracy where they do have to answer to a large number of people an county that is a democracy would be the united states. a country that is an oligarchy would be the china.