Answer:
C) Communist powers.
Explanation:
President  Harry Truman was the US leader of the beginning of the Cold War. The former allied the Soviet Union turned into a bitter rival of the US and the West following the end of the WWII. The Soviet Union had a powerful army and it had control of Eastern Europe. At the time, Western Europe was afraid of Soviet expansion. All of this turned into a world rivalry between two superpowers, and the US, guided by the doctrine of containment, opposed Communist advance around the globe.
