The main outcome of the North Atlantic treaty was that all members agreed to treat an attack on one as an attack on all. The correct option in regards to the given question is option "D". The North Atlantic Treaty Organization was created in the year 1949 by the United States of America, Britain and several other Western European nations. The main reason for this kind of treaty was that the countries were fearful of an attack by the Soviets. This treaty made it clear that every member country would jump to protect one another whenever attacked by any other country from outside the members.
