Which country was mostly made up of many ethnic minorities? yugoslavia hungary ireland china

The correct answer is Yugoslavia.

Yugoslavia was a Balkanic country formed after the WWI and fell after the disintegration of the Soviet Union and the end of the Cold War. It was a multiethnic and multicultural country, which contained a plurality of nations from different origins, like the Serbs, the Croatians, the Slovenians, the Bosnians, the Macedonians, the Montenegrins, and the Albanians. After the death of the leader Josip Broz Tito during in 1980 and the fell of the Communist ideology that used to provide political unity, nationalism rose, and therefore Yugoslavia collapsed and different states emerged from it.