What key event led to the outbreak of world war i? The rise of a fascist German chancellor, the assassination of an Austrian archduke, the invasion of Vienna by the serbs, the seizure of Romania by Bulgaria. Which one answer is correct

Answer 1

The assassination of an Austrian archduke is the correct answer. The assassination of Archduke Franz Ferdinand of Austria-Hungary by Gavrilo Princip in Sarajevo on June 28, 1914, is considered the key event that led to the outbreak of World War I.