What role did the United Nations play after World War II, and how did the U.S. contribute to its formation?

• A. It was established to prevent future wars; the U.S. helped found and supported it as a key member and leader
• B. It was created to punish defeated nations
• C. It operated solely as a cultural organization
• D. It replaced the League of Nations and took no U.S. role

Answer: (A)