Answer:
C They were both created by the Treaty of Versailles.
Explanation:
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The correct option is: They were both created by the Treaty of Versailles.
During the socialist period, Yugoslavia, the Soviet Union, and Czechoslovakia shared a similar characteristic: a national-federal structure. Just as importantly, this same characteristic also distinguished them from their socialist neighbors.
Yugoslavia and Czechoslovakia developed different political and economic structures: As a monarchy, Yugoslavia slid into a dictatorship, while Czechoslovakia remained democratic until the end of the 1930s (the only country in Eastern Europe in the interwar period to do so); Yugoslavia was an Agrarian state.
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