How can nationalism be considered a cause of world war i? a. nationalism promoted economic competition among nations. b. nationalism created ethnic tensions, resulting in civil war. c. many germans relocated to belgium, where they felt more culturally connected. d. nationalism had destroyed the holy roman empire, without which europe was out of control.

Option:  B. Nationalism created ethnic tensions, resulting in civil war.

Explanation:

The nationalism began in Europe after the fall of Napoleon. The idea of nationalism was rising among the ethnic peoples in Europe when they wanted to establish their identity. Nationalism culminated into uniting all the states together to form a nation. Some of the ethnic group like Serbian nationalists who showed hostilities because they were against the annexation of Bosnia under Austria-Hungary in 1908. The tensions resulted in the assassination of Archduke Franz Ferdinand of Sarajevo by a Bosnian Serb nationalist.