Traditional: Based on traditions and customs
Communist: Controlled by the government
Socialist: Equal results for everyone
Market: Based on demand and supply force
I'm not 100% sure if these are right but these are what I think they are.
The American attitude shifted in favor of rights for Native Americans. This is based on "Polls showed that Americans believed in rights for Native Americans". Why it's not B is because it wasn't the polling that contributed to the act, but what the polls showed which is C.
It would be "(A) Institution of a secret ballot" that was not part of the Populist Party’s platform, since the Populists were largely about transparency--both within government and big business.
