After World War I, which institutions were created or promoted?

• A. The Treaty of Versailles and the League of Nations
• B. The United Nations Security Council
• C. The World Trade Organization
• D. The North Atlantic Treaty Organization

Answer: (A)

After World War I, leaders aimed to prevent another large-scale war by creating international institutions that would promote cooperation and resolve disputes through collective security. The Treaty of Versailles ended the war and, in its framework, championed the creation of the League of Nations to provide a forum for arbitration, mediation, and coordinated action against aggression. This reflects a direct effort after the conflict to institutionalize peace and gradually build collaborative international norms.

The other options come from events after World War II. The United Nations Security Council is part of the UN structure established in 1945 to maintain international peace and security. The World Trade Organization and NATO were formed much later, in 1995 and 1949 respectively, in the context of postwar economic integration and the Cold War alliance system.