The correct answer is C) Austria-Hungary was home to many different ethnic groups.
The other options of the question were A) The empire was made up mainly of Austrians and Hungarians. B) Austria-Hungary was the strongest of the European empires at this time. D) Italians were the largest ethnic group in the Austria-Hungarian Empire.
The information that the map provided about the Austria-Hungarian Empire is "Austria-Hungary was home to many different ethnic groups."
In the times of the Austria-Hungary Empire, many ethnicities that lived in those territories became part of the empire. We are talking about a diverse group of people formed by Croats, Hungarians, Poles, Serbs, Czechs, Slovenes, Germans, Slovaks, Rumanians, and Italians. Not always these ethnicities related well to each other although they were part of the Austria-Hungary Empire.