If it’s not c, then what is ittt? ! ‍♀️

I would believe it to be D than

i think its d im not sure tho

To the north, the Sioux, Northern Cheyennes, and Arapahos had forced the army to abandon its Bozeman Trail forts in Red Cloud’s War (1867). But arable lands and rumors of gold in the Dakotas continued to attract white migration; the government opened a major new war in 1876. Initial failures against a loose Indian coalition, forged by leaders including Crazy Horse and Sitting Bull, culminated in the annihilation of five troops of Custer’s cavalry at the Little Bighorn. A series of army columns took the field that fall and again the following spring. By campaigning through much of the winter, harassing Indian villages, and winning battles like that at Wolf Mountain (1877), Nelson A. Miles proved particularly effective. The tribes had to sue for peace, and even Sitting Bull’s band returned from Canada to accept reservation life in 1881. Another outbreak among the Sioux and Northern Cheyennes, precipitated by government corruption, shrinking reservations, and the spread of the Ghost Dance, culminated in a grisly encounter at Wounded Knee (1890), in which casualties totaled over two hundred Indians and sixty-four soldiers.

answer; /// i believe that the correct answer is (b)///they gained vast amounts of

i believe we're not a republic so that is a hard question