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.
That's the same question I had but I don't know the answer.
Answer:
1. German
2. Britain, France, and Russia
Explanation:
I think that the world would be a better place because the money from the usa would be spread all around the world but many important discoveries won't be made