He did so because he wanted revenge on France and England for winning the first war. He was a young soldier in the WWI and felt that Germany was shamed after the war. So he started the second to gain respect back and to prove that their country was also a great superpower. He believed in racial purification and wanted to take over Europe and remodel it the way he wanted.
D. Because that was something made AFTER WWl it was made before wwll but after wwl