Eastern bloc were the groups that operated by the idealogy of Soviet Union communist ideas. The fall of the Soviet Union led to many political changes option D aptly describes them.
It is also known as Communist Bloc or the Soviet Bloc was the group influenced by the communist mindset of the soviet union during the Cold War(1945-1992).
After the decline of the Soviet Union the Eastern bloc was:
Therefore option D aptly describes the effect on the Eastern bloc of the Soviet Union's fall.
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