The aim of the was to limit the Soviet Union’s power and influence and to stop the spread of communism.

US containment policy

Explanation:

Explanation: US containment policy was proposed by the government to limit the powers of the Soviet Union and its spread of communism after World War II. This policy was a reply to the Soviet Union when it started to expand its communist control

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option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: