Answer :
(d) the Truman Doctrine.
The given quotation was taken from the Truman Doctrine which was a containment policy by President Truman. The idea was to halt Soviet Expansion, which is why the US is advocating for foreign intervention in the quote.
The given quotation was taken from the Truman Doctrine which was a containment policy by President Truman. The idea was to halt Soviet Expansion, which is why the US is advocating for foreign intervention in the quote.