Which of the following can be used to investigate the reason the assassination of Archduke Franz Ferdinand sparked World War ? (1 point ) 1. knowledge of the Schlieffen Plan 2. the role that East African soldiers played in the war 3. the nationality of Archduke Franz Ferdinand's assassin 4. the collapse of the alliance system
1. knowledge of the Schlieffen Plan - This can help understand how the assassination of Archduke Franz Ferdinand may have led to the activation of pre-existing military plans, such as the Schlieffen Plan, which could have escalated the conflict into a world war.
2. the role that East African soldiers played in the war - While the role of East African soldiers in World War I may be an interesting topic, it would not directly address the reason why the assassination of Archduke Franz Ferdinand sparked the war.
3. the nationality of Archduke Franz Ferdinand's assassin - The nationality of the assassin, Gavrilo Princip, being a member of the Bosnian-Serb nationalist group is crucial in understanding the cause of the assassination. However, it alone does not fully explain why it sparked World War I.
4. the collapse of the alliance system - This is a significant factor that directly addresses the reason why the assassination of Archduke Franz Ferdinand sparked World War I. The alliances between various countries led to a chain reaction of declarations of war after the assassination, ultimately resulting in a global conflict.