Answer: Czechs (which are also Slavs), Austrians, Slavs, Italians,
Hungarians
Explanation: The Habsburg Empire, or even known as the Danube Monarchy, included parts and kingdoms under the common Habsburg Archduchy from 1526 to 1804. In 1804, it was succeeded by the Austrian Empire, which lasted until 1867, and from 1867 to 1918 as Austria Hungarian Empire. Of the entities that were not offered as options, which were part of the Empire were Romanians, Ruthenians and a small number of Jews.