Which is a reason that the relationship between Austria-Hungary and Serbia dissolved?
Serbia allied with Germany, Austria-Hungary's rival
Serbia declared independence and started a revolution against Austria-Hungary
Austria-Hungary invaded northern Serbia in order to grow its empire
Austria-Hungary had annexed Bosnia and Herzegovina
Is it D?
Is it C?
Yes, it is D. Austria-Hungary's annexation of Bosnia and Herzegovina was one of the main reasons for the dissolution of the relationship between Austria-Hungary and Serbia. To verify this, one could study the historical events leading up to the tensions between the two countries. Research would involve examining the political, social, and military actions taken by both Austria-Hungary and Serbia during the period in question.
I think you're not reading your text materials again, Quinn. :)
https://www.history.com/this-day-in-history/austria-hungary-declares-war-on-serbia