Several of these questions are opinion, so I can't really help with those, but I can answer the first one.
After World War I, the League of Nations was created to try to help keep the peace and solve problems between nations. The same went for the United Nations after World War II. There were also the treaties that ended the wars. (You'll have to decide whether or not these were actually successful.)
I believe this is False. There were lots of different penalties for different laws
Answer:
North America includes the United States and Canada and North America could be considered a Region
Answer:
A. tarrif of 1833 that's the answer
