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

A The role that east African soldiers played in the war
B The nationality of archduke Franz Ferdinand assassin
C The collapse of the alliance system
D Knowledge of the Schlieffen Plan

B The nationality of archduke Franz Ferdinand's assassin

To investigate the reason the assassination of Archduke Franz Ferdinand sparked World War I, we need to determine the factors that contributed to the outbreak of the war. Let's evaluate each option and see how it connects to the assassination:

A) The role that East African soldiers played in the war: This option does not directly relate to investigating why the assassination of Archduke Franz Ferdinand sparked World War I. While the role of East African soldiers in the war is a topic of historical interest, it does not shed light on the specific cause-and-effect relationship between the assassination and the outbreak of the war.

B) The nationality of Archduke Franz Ferdinand's assassin: This option is more relevant to investigating the reason behind the war's outbreak. By knowing the nationality of Archduke Franz Ferdinand's assassin, we can examine whether there was any geopolitical motivation or involvement by a specific country or nationalist group. Investigating the assassin's background and any connections to larger political movements can provide insights into the wider context of the assassination.

C) The collapse of the alliance system: This option is also relevant to understanding the reasons behind World War I. The assassination of Archduke Franz Ferdinand was not the sole cause of the war; it served as a trigger that ignited existing tensions among the European powers. Investigating the collapse of the alliance system can help establish how the assassination interacted with preexisting alliances and rivalries, ultimately leading to a wider conflict.

D) Knowledge of the Schlieffen Plan: While the Schlieffen Plan was a strategy implemented by Germany in case of a two-front war, it does not directly address the reason why the assassination of Archduke Franz Ferdinand sparked World War I. The plan itself was already in place before the assassination and was designed to secure German victory in a potential conflict involving both France and Russia.

In summary, option B (the nationality of Archduke Franz Ferdinand's assassin) and option C (the collapse of the alliance system) are the most relevant choices for investigating the reasons behind World War I. While the other options may provide interesting historical context, they do not directly address the specific cause-and-effect relationship between the assassination and the outbreak of the war.

C The collapse of the alliance system is the most relevant factor to investigate the reason the assassination of Archduke Franz Ferdinand sparked World War I. The alliance system in Europe at that time was a complex network of alliances between countries, such as the Triple Entente and the Central Powers. When the assassination occurred, these alliances were triggered, leading to a chain reaction of declarations of war between countries and ultimately escalating into a full-scale world war. Understanding the collapse and impact of the alliance system is crucial to comprehending the outbreak of World War I.