The purpose of the Truman Doctrine of 1947 was to decrease the risk of nuclear war by placing atomic weaponry under the control of the United Nations A prevent communism from spreading further through military aggression B retake Eastern Europe from the Soviet Union C prevent the spread of independence movements in European colonies in Asia and Africa D create an atmosphere of trust in which negotiation with the Soviet Union would have the best chance for success

The right choice is:

To prevent communism from spreading further through military aggression.

Explanation:

The Truman doctrine said that the United States would come to the aid of any country under a threat of internal forces (meaning a communist insurgency)  or  from an outside force (Soviet military aggression) to its domestic order. Washington would use all means available such as economic aid, military support or diplomatic initiatives. The doctrine was articulated by the Harry Truman administration to guide US policy of  opposing communist expansion.

well the fact it is basically a peninsula allowed trade to come from many places, thus allowing cultural diffusion to take place. india has seasonal monsoons that merchants travel back and forth from india using the monsoons wind patterns

i believe the correct answer is option b. most eastern european nations joined nato.

though i could be wrong, option d. the eastern european nations were granted complete independence, would be another choice.

hope this ! : )