The percentage of unionized workers in
states with right-to-work laws is half that of the nation's overall
percentage of union workers. How might right-to-work laws
reduce union membership?

The correct answers are

to form a lasting peace with just treaty terms- This is evident from Wilson's 14th point which resulted in the creation of the League of Nations. This international organization would be focused on ensuring world peace by bringing together countries from all over the world. His hope was that this organization would allow for countries to solve their problems diplomatically rather than through warfare.

to establish trade barriers as an economic means of punishing aggressive countries. - Wilson did not believe directly blaming a country for the beginning of the war or reducing the size of a country's military would be effective ways to prevent future acts of aggression. Rather, he felt that hurting their economic prospects was a much better way to ensure their cooperation in the future.