Which of the following events marked a key outcome after World War II?

• A. The creation of the United Nations
• B. The signing of the Magna Carta
• C. The discovery of penicillin
• D. The fall of the Roman Empire

Answer: (A)

Postwar international cooperation and attempts to ensure lasting peace are reflected in the establishment of new global institutions. The creation of the United Nations in 1945 embodies that outcome, providing a global forum to prevent future wars, coordinate security efforts, and promote human rights and development. The other events come from different eras and contexts: the Magna Carta dates to medieval England and aimed to limit royal power long before modern international bodies; the discovery of penicillin revolutionized medicine but isn’t a postwar institutional development; and the fall of the Roman Empire marks ancient history.