The person in question is Woodrow Wilson:
He was the president of the United States from 1913 to 1921, which means that he was the president before, during and after the First World War.
He was very active in the peace process after the war, including proposing the formation of the League of Nations.
Because the United States struggled to Unite and quell the rebellion, the answer is B. The United States realized it needed to be more centralized in order to deal with internal and external threats.
I THINK ITS D. A bill of rights IF NOT IM SORRY IM NEW AT THIS