Which of the following ethnic groups wanted to break from Austrian control before World War I?

The answer is the Serbs ethnic group. This ethnic group wanted to break away and form their own state between the years of 1912-1913. This breakage was before the start of the First World War. A lot of Serbia desired to be free and not to be controlled by the authority of other nations, so they broke from the Austrian Control, while they were supported by Russia, which caused as a threat to the Empire of Austro-Hungarian.