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.
Not giving her seat up to a white man or a segregated bus. It sparked a lot of conflict which led to peaceful protest.
The emergency banking act of 1933 gave federal government power to fund banks to stay open.
The Chinese citizens didn't like how they were being treated so the rebelled against the government