Which of the following can be used to investigate the reason the assassination of Archduke Franz Ferdinand sparked World War I?(1 point)

Responses

knowledge of the Schlieffen Plan
knowledge of the Schlieffen Plan

the nationality of Archduke Franz Ferdinand’s assassin
the nationality of Archduke Franz Ferdinand’s assassin

the role that East African soldiers played in the war
the role that East African soldiers played in the war

the collapse of the alliance system

the collapse of the alliance system