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. 

i would say your answer is a)

sorry if im wrong

he risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation: