What key event led to the outbreak of World War I?

Question

What key event led to the outbreak of World War I?

A.
the rise of a fascist German chancellor

B.
the assassination of an Austrian archduke

C.
invasion of Vienna by Serbs

D.
the seizure of Romania by Bulgaria

Answer 1

B. the assassination of an Austrian archduke (Archduke Franz Ferdinand) by a Serbian nationalist in Sarajevo, Bosnia, on June 28, 1914, which triggered a series of alliances and diplomatic tensions among European powers and ultimately led to the outbreak of World War I.

Answer 2

What key event led to the outbreak of World War I?

B. the assassination of an Austrian archduke (Archduke Franz Ferdinand) by a Serbian nationalist in Sarajevo, Bosnia, on June 28, 1914, which triggered a series of alliances and diplomatic tensions among European powers and ultimately led to the outbreak of World War I.

B. The assassination of an Austrian archduke