Answer and explanation

Correct answer: A. 1914

  1. Step 1: The war started after the assassination of Archduke Franz Ferdinand in Sarajevo in 1914. Answer: 1914. Why not the others: 1917 is the Russian Revolution year and 1939 the start of the Second World War.

Practise more World History: World Wars and the Cold War.

Free questions with an explanation for every one, and full timed Sciences Po and Grandes Ecoles Entrance Practice mock tests.