Which of the following can be used to investigate the reason the assassination of Archduke Franz Ferdinand sparked World War I?

Responses

the collapse of the alliance system
the collapse of the alliance system - not selected, this is the correct answer

the role that East African soldiers played in the war
the role that East African soldiers played in the war - no response given

knowledge of the Schlieffen Plan
knowledge of the Schlieffen Plan - no response given

the nationality of Archduke Franz Ferdinand’s assassin
the nationality of Archduke Franz Ferdinand’s assassin - incorrect
Score

1 out of 1. The collapse of the alliance system is the correct response for investigating the reason the assassination of Archduke Franz Ferdinand sparked World War I.