Answer:
none of the above
Step-by-step explanation:
The answer is none of the above because the reason why Henry Cabot Lodge (the Republican Senator you would be personifying) opposed the Treaty of Versailles was that it created the Leage of Nationis.
Cabot believed that such a treaty was a very serious threat against national sovereignty, and he crusaded in Congress for the disapproval of the treaty on that basis. He was successful in doing so, and the United States never became a part of the Leage of Nations.