50pts! how did the annexation of bosnia and herzegovina in 1908 intensify the rivalry between austria-hungary and serbia?

austria-hungary vowed to take back the annexed territory from serbia.
serbia vowed to take back the annexed territory from austria-hungary.
austria-hungary attacked serbia to stop ethnic unrest.
serbia vowed revenge and recruited russia to attack austria-hungary.

I think it is C. Austria-Hungary attacked Serbia to stop ethnic unrest.

Hope this helps!

others, still angry about the revolution, argued against a commercial treaty with the britain promised to withdraw all of its troops from america after the in the northern frontier, however, the british refused to surrender several military posts on a stronger central government in america may have resolved these foreign.

hope this : d

a. competition between france and england for land and power