Answer:
Option B. Czechoslovakia was the Eastern European nation that held a peaceful transfer of power from communism to democracy.
Explanation:
Known as "The Velvet Revolution", Czechoslovakia conducted a non-violent transition of power that marked the end of a 41 years one-party rule in the country, and the secession of power from the communist authorities, in order to convert to a parliamentary republic. Czechoslovakia can be considered one of the anomalies when it comes to shift in power from a communist regime to a democratic one, with most of the other cases involving violence and conflict.