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.
The American attitude shifted in favor of rights for Native Americans.
Explanation:
The Indian Self-Determination and Education Assistance Act was passed in 1975. Its main purpose was to authorize some federal agencies to enter contracts and make grants directly to Indian tribes. In addition, one important factor was that the act would give the tribes authority over how they administered the funds. This was an important step towards ensuring the self-determination of Native people.
One of the reasons why the act was passed was because popular opinion in America had begun to favor granting rights to Native Americans. This was most likely a result of movements such as the American Indian Movement and the Civil Rights movement.
