Triple

Target entity: Soviet invasion of Czechoslovakia
Context triple: [The Book of Laughter and Forgetting, relatedToEvent, Soviet invasion of Czechoslovakia]

• A. Warsaw Pact invasion of Czechoslovakia chosen
  The Warsaw Pact invasion of Czechoslovakia was a 1968 military intervention by Soviet-led Eastern Bloc forces that crushed the liberalizing Prague Spring reforms and reasserted hardline communist control.
• B. Prague Spring
  Prague Spring was a brief period of political liberalization and reform in communist Czechoslovakia in 1968 that was ultimately crushed by a Soviet-led invasion.
• C. Czechoslovak coup d’état of 1948
  The Czechoslovak coup d’état of 1948 was a Communist Party–led takeover that ended multiparty democracy in Czechoslovakia and established a pro-Soviet communist regime at the start of the Cold War.
• D. Liberation of western Czechoslovakia
  The Liberation of western Czechoslovakia was the final World War II campaign in which U.S. and other Western Allied forces freed the western regions of Czechoslovakia from Nazi German occupation in the spring of 1945.
• E. Soviet interventions in Eastern Europe
  Soviet interventions in Eastern Europe were a series of military and political actions by the USSR to maintain control over its satellite states and suppress reform movements during the Cold War.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.