The treaty that ended world war i but was rejected by the us senate was called the treaty of

Versailles?

Explanation:

The treaty that ended World War I but was rejected by the US Senate was called the Treaty of Versailles

Explanation:

The treaty of Versailles, which was signed on 28 June 1919, was the treaty that brought WWI to and end and made Germany responsible for the outbreak of the war. American President Woodrow Wilson approved the treaty, however, the US never became part of it because it was not approved by Congress. The US Senate refused to sign it mainly because it did not want to be part of the League of Nations, an international peacekeeping organization that could drag the nation into more world conflicts.

i believe the correct answer is b.