(A) ** the assassination of Archduke Ferdinand or Austira-Hungary.
(B) the bombing of Pearl Harbor.
(C) the assassination of Czar Nicholas II
EXPLANATIONS BELOW
Concept note-1: -Archduke Franz Ferdinand of Austria and his wife Sophie are shot to death by a Bosnian Serb nationalist during an official visit to the Bosnian capital of Sarajevo on June 28, 1914. The killings sparked a chain of events that led to the outbreak of World War I by early August.
Concept note-2: -Two shots in Sarajevo ignited the fires of war and drew Europe toward World War I. Just hours after narrowly escaping an assassin’s bomb, Archduke Franz Ferdinand, the heir to Austro-Hungarian throne and his wife, the Duchess of Hohenberg, are killed by Gavrilo Princip.
Concept note-3: -The start of World War I, the so-called “Great War” of 1914 to 1918, was triggered when a teenage Serbian revolutionary shot Archduke Franz Ferdinand, the presumptive heir to the Austro-Hungarian throne, and his wife Sophie on their visit to the Bosnian capital of Sarajevo.