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Containmen</em>t was the foreign policy of US government to contain the spread of Soviet Influence in 1940's. It is also known as a cold war policy of US and its allies at the end of World War Two. This policy represented a middle position between rollback and detente. It was an outcome of Truman doctrine and was announced by President Harry S. Truman on March 12, 1947. Later the Internal Security act of 1950 was passed into a federal law. President Truman had vetoed it but the <em>congress enacted it.</em>
The correct answer among all the other choices is Interstate Highway System. This Cold War protection is still in use today. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
