Answer: Option (A) is correct.
Step-by-step explanation:
The Truman Doctrine is considered as a US foreign policy under which the main purpose was to stop USSR geopolitical increase at the time of Cold War. It was officially presented to Congress on March 29, 1947 by Harry S. Truman , who at that time was serving as the president. This doctrine further evolved on July 4, 1948 as Harry S. Truman pledged in order to quarantine threats evolving in Greece and also Turkey.