(A) ** Treaty of Versillies
(B) alliance
(C) League of Nations
(D) Nationalism
EXPLANATIONS BELOW
Concept note-1: -On June 28, 1919, the Treaty of Versailles was signed at the Palace of Versailles outside Paris, France. The treaty was one of several that officially ended five years of conflict known as the Great War-World War I.
Concept note-2: -After four years of devastating fighting, the First World War came to an end in 1919 in Versailles. The treaty, which represented “peace” for some and a “diktat” for others, also sowed the seeds of the Second World War, which would break out twenty years later.