What was the name of the policy created in 1947 and used by the americans against communism?

The answer is: That´s the Truman Doctrine.

Explanation:

The Truman Doctrine is  a foreign policy conception formulated by president Harry Truman in 1947. It was designed in order to oppose and contain Communist expansion around the world. It was a major development in the US geopolitical strategic thinking. Truman´s diplomatic strategy was a major reorientation of American foreign policy which had traditionally advocated taking distance from regional conflicts and  involvement. The Truman Doctrine says that the US will provide all types of assistance to any nation threatened by internal or external authoritarian forces.

b) brahmans   is nomadic society

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.