He did not want to get involved with the North Atlantic Treaty. A conservative position that many have criticized. However, Senator Taft was more interested in the protection and preservation of his own country. Right after the Vietnam war, his foreign policy was taken seriously. He was more concerned about his nation's defense than to get involved with wars.
I believe that although the constitution has not changed much since it was written, but I do believe that however, the interpretation of the constitution has changed over time. I believe that the Founding Fathers would be a little shocked if they were to travel through time and see how the US is right now.
Answer:
B. It allowed Germany to expand its territory and checked until it became a direct threat, making it war avoidable.