What was an outcome of the north atlantic treaty? a. the united states extended its policy on isolationism. b. the soviet union blockaded berlin. c. north korea attacked south korea. d. all members agreed to treat an attack on one as an attack on all. e. russia acquired poland and bulgaria.

The correct answer is D. All members agreed to treat an attack on one as an attack on all. Nato was created with the idea that there should be a body of collective defensive force that would preserve peace and prevent unwanted warfare. Another thing was that if both countries were members of the treaty and had disputes, the other would not interfere or choose sides and the two countries could sort it out on their own.