Answer:
B. Habsburg Empire
Explanation:
The Habsburg Empire was both the King of Hungary and the emperor of Austria. It is also known as the Austrian Monarchy of the Danube Monarchy.
In 1867 The Austro-Hungarian empire merged and formed the Habsburg Empire into an alliance of two sovereign states.
Austria-Hungarian empire was the dual government in which both sides have their own Constitution where the half side of the people was treated foreigners in another half side. Within the Empire, there were many subordinated ethnic groups, including Slavs, with whom it was never interested in resolving their national issues.