I believe it is B. The purpose establishment of the League of Nations was to resolve international conflicts without war.
Choice A doesn't really make sense because neutral nations don't join war alliances; they remain neutral. Choice C and D actually would lead to more wars because Germany was bitter about being forced to accept the defeat. They further had to pay for the reparations, which wouldn't make anyone happy.
C.
This is why we have good relations currently.
The Answer You're Looking For Is:
~The Invasion Of Belgium.
Hope this helps.
Answer: The answer is -- (A) The Cold War.
Explanation: The Cold War was a period of geopolitical tension between the Soviet Union and the United States and their respective allies, the Eastern Bloc and the Western Bloc, after World War II. The period is generally considered to span the 1947 Truman Doctrine to the 1991 dissolution of the Soviet Union. Hope this helps!