Under the Treaty of Fort Laramie, What Did Oglala Sioux

Under the Treaty of Fort Laramie, what did Oglala Sioux warrior Red Cloud accomplish for his people?

A) The federal government granted the Sioux the right to occupy the Black Hills.
B) The federal government recognized the Sioux's own rights of conquest over other Indian tribes and allowed them to keep their rivals' hunting lands.
C) Military forts and white settlements were banned along the Bozeman Trail, the Sioux's principal buffalo range.
D) The federal government granted the Sioux safe passage, so they could peacefully resettle in Canada.