What pact signed in 1949 reinforce that the united states would not return to an isolationist policy?

a. the nato agreement

b. warsaw pact

c. truman doctrine

d. marshall plan

"The NATO agreement" is the one pact signed in 1949 among the choices given in the question that helped to reinforce that the United States would not return to an isolationist policy. The correct option among all the options that are given in the question is the first option or option "A". I hope the answer helps you.

Bis your answer and your welcome