The correct answer is A: The Big Three didn’t give Italy the lands that it had been promised before the war.
The Treaty of Versailles was a peace treaty that put an end to World War I. It was led by the Big Three, the winners of the war: David Loyd George from the UK, George Clemenceau from France, and Woodrow Wilson from the US.
Italy's reaction to the decisions accorded in this treaty was very negative, mainly because the Big Three rejected to give to Italy what was its main goal during the war and that cost thousands of Italian lives: to recover the Dalmatian coast and Fiume.