The correct answer is A) many of the Balkans’ countries had nationalist independence movements.
The Balkans were called the “powder keg” of Europe because many of the Balkans’ countries had nationalist independence movements.
There had many many conflicts, tensions, and armed confrontations in this region of the world. Before World War 1, this part of Southeastern Europe had so many ethnic, race, and political conflicts that made the zone living in constant tension. Indeed, Arch-DUke Franz Ferdinand and his wife were assassinated in Sarajevo, and this crime was a direct cause that started World War 1.
