Which of these events ultimately led to World War I? Choose three answers.The assassination of Archduke Franz Ferdinand angered Austria.Serbia declared war on Austria, which caused Austria’s allies to go to war.Nationalism increased tensions in the Balkan peninsula.Russia's mobilization plan called for an invasion of France through Belgium.Alliances caused a chain of events that pulled each country into war.
Answer
A
The assassination of Archduke Franz Ferdinand angered Austria.
B
Serbia declared war on Austria, which caused Austria’s allies to go to war.
C
Nationalism increased tensions in the Balkan peninsula.
D
Russia's mobilization plan called for an invasion of France through Belgium.
E
Alliances caused a chain of events that pulled each country into war.
Explanation
The assassination of Archduke Franz Ferdinand angered Austria-Hungary and helped trigger its conflict with Serbia. Nationalism heightened tensions in the Balkans, making disputes there more dangerous. Alliances then drew additional countries into the conflict. Serbia did not declare war on Austria, and the plan to invade France through Belgium was Germany’s Schlieffen Plan, not Russia’s mobilization plan.
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