Why did the United States introduce the Marshall Plan in the postwar era? to stabilize Europe and support democratic governments to encourage Europe to share its postwar prosperity with the United States to help the USSR form a democratic government to boost economic recovery in the United States after World War II.

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

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the answer is c my brotha. c.   formed an alliance with the soviet union.