PlEASE I NEED HELp How did the assassination of Archduke Franz Ferdinand lead to World War I?
A. Germany ended diplomatic relations with Austria after the assassination resulting in outbreak of war
B. War broke out when Serbia refused to agree to a list of Austrian demands after the assassination
C. Troops protecting the Archduke retaliated by attracting Serbian military positions after the assassination
D. Russian troops invaded Serbia after this fascination seeking revenge for the death of Czars cousin