The correct answer is A) it weakened Wilson's support for a League of Nations.
You did not include the speech, the text, or any reference to it. However, we can assume that you are talking about the famous "14 Points Speech," delivered by the United States President, Woodrow Wilson on January 8, 1918.
So the speech impacted the U.S. Position in the Treaty of Versailles negotiations in that it weakened Wilson's support for a League of Nations.
The idea of Wilson's speech was to sign a peace treaty that could consider different factors such as being tolerant and unselfish with the peace terms. But Great Britain and France -more than peace- they wanted retribution.
In the end, that is why the United States did no support and did no took part in the conformation of the League of Nations.