Respuesta :

Serbia wanted to incorporate Serbians in Bosnia into their kingdom, Austria-Hungary wanted to strengthen their hold on their multi-ethnic empire.

Answer:

The most direct way nationalism caused World War I was through the assassination of Archduke Franz Ferdinand, who was the heir to the throne of the Austro-Hungarian Empire. Many oppressed Slavic groups in the Austro-Hungarian Empire wanted to form independent nation states. ... Soon enough, World War I broke out.

Explanation: