A. Fifth
B. Fourth
C. Third
D. Seventh
🧠 Explanation:
Kurt Waldheim, an Austrian diplomat, served as the fourth UN Secretary-General from 1972 to 1981. His two terms focused on peacekeeping and global diplomacy. This role is a key topic in international relations, engaging students and historians studying UN history. Waldheim’s tenure addressed major global conflicts, making it relevant for understanding diplomatic efforts and their impact on world peace. His leadership highlights the challenges of international governance, attracting those exploring global politics and the UN’s role in fostering cooperation among nations.