The answer is B: Hungary held its first free elections
The so called Revolution of 1989 ended the Communist party in Hungary. Many other former communist countries and the west were putting pressure on Hungary to Westernize. The economic and social pressure ended up with the dissolving of the Communist Government and a democracy was formed.
The first free election took place in 1990. The Communists fell into oblivion for a while until the rise of the alt-right and alt-left parties in the late 2000s.
