Step 1: Understanding the events and their respective years.
- (A) Hiroshima and Nagasaki atomic bomb attacks: These attacks occurred in 1945 during World War II.
- (B) Formation of WTO: The World Trade Organization (WTO) was established in 1995, replacing the General Agreement on Tariffs and Trade (GATT).
- (C) Soviet Invasion of Hungary: This event occurred in 1956, when the Soviet Union invaded Hungary to suppress a revolution.
- (D) Collapse of the Soviet Union: The Soviet Union officially collapsed in 1991, marking the end of the Cold War.
Step 2: Matching the events with the correct years.
- A - III: Hiroshima and Nagasaki atomic bomb attacks occurred in 1945.
- B - IV: Formation of WTO occurred in 1995.
- C - II: Soviet Invasion of Hungary took place in 1956.
- D - I: Collapse of the Soviet Union happened in 1991.
Step 3: Conclusion.
The correct matching is (2) A - III, B - IV, C - II, D - I.