Answer: a. he wanted to help design the peace settlement.
The design of the peace settlement of World War I, also known as the Treaty of Versailles, was greatly influenced by Wilson. His doctrine of the "Fourteen Points" was reflected in the eventual language and provisions of the treaty. Both the drafting of the treaty, and the participation in the war, were motivated by Wilson's desire to spread democracy all over the world. Wilson believed this was the right method to bring the world back to safety and encourage a world order in which democratic rule could thrive.
