Which best defines ratified?
The United States joins the United Nations.
Truman adopts a "get tough" policy concerning Soviet relations,
The Marshall Plan contains the threat of Communism.

Harry S Truman became President of the United States on 12 April 1945, amidst profound concern about his capacity for national or world leadership. He was untutored in foreign affairs, and knew nothing about the complex diplomacy of his predecessor, Franklin D Roosevelt. At the same time the expedient Anglo-American-Soviet alliance - formed in opposition to Nazi Germany during World War Two - was growing strained over Russian actions in eastern Europe, and over Allied policy differences towards a soon-to-be defeated Germany.

Explanation:

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for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation: