Answer:
B.
Step-by-step explanation:
October 24, 1945, San Francisco, CA
The United Nations is an international organization founded in 1945 after the Second World War by 51 countries committed to maintaining international peace and security, developing friendly relations among nations and promoting social progress, better living standards and human rights.
The United Nations (UN) was created at the end of World War II as an international peacekeeping organization and a forum for resolving conflicts between nations. The UN replaced the ineffective League of Nations, which had failed to prevent the outbreak of the Second World War.