The correct response is:
These elections signified the transformation of Eastern Europe from dominance by the Soviet Union to new democracies.
Lech Walesa's election as president of Poland and Václav Havel's election as president of Czechoslovakia marked significant milestones in the shift from authoritarian communist regimes to democratic governance in Eastern Europe. These events were emblematic of the broader political changes occurring in the region during the late 1980s and early 1990s, signaling a departure from Soviet influence and the beginning of democratic movements.