What native tribe signed the treaty that was last ratified around 1868? Nez pierce
ojibway
cherokee
Deleware

Sioux

Explanation:

In this final treaty, signed at Fort Laramie and other military posts in what is now Wyoming, the U.S. government recognized the Black Hills of Dakota as the Great Sioux Reservation, the exclusive territory of the Sioux (Dakota, Lakota and Nakota) and Arapaho people. By that time, Congress had ended the nearly 100-year-old practice of making treaties with individual Native American tribes, declaring in 1871 that “henceforth, no Indian nation or tribe...shall be acknowledged or recognized as an independent nation, tribe or power with whom the United States may contract by treaty.”

Ithink it is c. the government would try to limit the influence of outside cultures.