1. The correct answer here is D. Japan’s economy was in a great state after the World War I but as the Great Depression hit so did the Japanese economy plummet. Japan has a few national resources and relies mainly on import. Because of the Great Depression the trade with the foreign nations was in ruins which led to the economic crisis. Because Japan was lacking resources and land space they invaded Manchuria.
2. The correct answer here is C. Both Italy and Japan believed that they were not rewarded adequately for their efforts in the war. Both expected more territory and were left wanting. This can be seen as one of the reasons why these countries developed later as they did and sided with Germany in the WWII.
4. The correct answer here is A. Unfortunately, the League of Nations was not very strong. They had no army and the both Italy and Germany largely ignored their decrees. The League of Nations reacted the only way it could and that was by imposing sanctions and enforcing trade embargoes on these states.