Question

select the correct answer.

which event started world war i?

the sinking of the lusitania by german u-boats
the assassination of archduke franz ferdinand and his wife, sophie
germanys annexation of alsace and lorraine after the franco-prussian war
the russian enforcement of pan-slavism throughout slavic nations
the signing of treaties in 1839 and 1867 to protect belgiums neutrality

Explanation:

Identify the immediate trigger of World War I

The question asks for the specific event that started World War I. We need to distinguish between long-term causes (such as alliances, militarism, and imperialism) and the immediate spark (the catalyst) that directly led to the outbreak of hostilities in 1914.

Evaluate the historical options

• The sinking of the Lusitania by German U-boats: This occurred in May 1915, after the war had already begun, and contributed to the United States eventually entering the war.
• The assassination of Archduke Franz Ferdinand and his wife, Sophie: This event occurred on June 28, 1914, in Sarajevo. It triggered the July Crisis, leading directly to the declarations of war in late July and early August 1914.
• Germany's annexation of Alsace and Lorraine: This occurred in 1871 following the Franco-Prussian War, acting as a long-term source of tension between France and Germany, not the immediate trigger.
• The Russian enforcement of Pan-Slavism: This was a long-term ideological movement that influenced Russian foreign policy and alliances, but was not a single starting event.
• The signing of treaties in 1839 and 1867 to protect Belgium's neutrality: These treaties established international agreements long before the war. The violation of Belgium's neutrality in 1914 brought Britain into the war, but the treaties themselves did not start it.

Determine the correct choice

The assassination of Archduke Franz Ferdinand of Austria-Hungary by a Serbian nationalist is universally recognized as the immediate catalyst that set off the system of World War I Alliances, initiating the war.

Answer:

• the sinking of the Lusitania by German U-boats
• the assassination of Archduke Franz Ferdinand and his wife, Sophie (Correct answer)
• Germany's annexation of Alsace and Lorraine after the Franco-Prussian War
• the Russian enforcement of Pan-Slavism throughout Slavic nations
• the signing of treaties in 1839 and 1867 to protect Belgium's neutrality