Answer:
Serbian nationalism is what caused war
Explanation:
nationalism in a whole started coming into play during the 1860s and would lead to the formation of a German state known as the German Empire It also unified separate Balkan states under nationalities like Bulgaria, Greece, Serbia, Romania, ect.
The key cause was economic hardship
The Urban Areas were used to house these Immigrants and they grew larger.
Yes I do think so I studied it
