After the assassination of the austrian archduke, which happened first?

germany invaded belgium.
great britain invaded germany.
russia declared war on serbia.
austria declared war on serbia.

The right answer is Austria declared war on Serbia.

The expansion of the conflict from an incident in the Balkans to a world war was a direct result of the alliance system. Austria-Hungary, with support from Germany, quickly issued an ultimatum consisting of ten demands to Serbia. Serbia agreed to accept nine of the ten demands but refused to agree to the last one- that officials from Austria-Hungary be involved in the investigation into the assassination of the Archduke. When Serbia failed to agree to all ten demands, Austria-Hungary declared war on Serbia on 28 July 1914.

D

Explanation:

most are appointed by the president and confirmed by a vote in the senate. however, appeals court judges appoint federal bankruptcy judges, and district judges appoint federal magistrate judges. the qualifications for these positions vary depending on the preferences of the person reviewing nominees.

hope this , give me brainliest answer = )

6 units. ab and lo are congruent sides, and if ab= 6 units, then lo would be the same.