Single stories negatively relate to U.S. history because it caused a lot of hate to be given toward a specific person or group of people just because someone made up a fake story. Single stories have always been a problem not just now but all throughout history.
India
It's India because they needed vast caste system.
C Economic success would bring about equality and respect
I do not think it is a complete sentence because, what's behind the door?
I think it's all of them except the first one, Germany was not occupied by the allies :)
http://www.bbc.co.uk/schools/gcsebitesize/history/mwh/ir1/thetreatyrev1.shtml