What was the name of the treaty that ended World War I?
a. the Peace of Paris
b. the Treaty of Versailles
c. the Treaty of Brest-Litovsk
d. the Peace of the Central and Allied Powers
The name of the treaty that ended World War I was "b. the Treaty of Versailles," and its harsh treatment of Germany was actually a major cause of World War II breaking out.
The Treaty of Versailles was signed on June 28, 1919, five years after the assassination of Archduke Franz Ferdinand, the event that started World War I.