Under the truman doctrine the united states agreed to

Explanation:

Under the Truman Doctrine, the United States was prepared to send any money, equipment, or military force to countries that were threatened by the communist government, thereby offering assistance to those countries resisting communism.

United States presidential doctrines - Wikipedia

en.wikipedia.org/wiki/United_States_presidential_doctrines

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

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