<span>International tensions caused by nationalism and imperialism led to world war (mainly through military build up), which led to world dominance by the most powerful nations.</span>
The correct answer is the conference.
At the conference, Supreme Court justices meet and debate issues and discuss the cases before the Court.
<span>The Charter of the United Nations was signed on 26 June 1945, in San Francisco, at the conclusion of the United Nations Conference on International Organization, and came into force on 24 October 1945.</span>
