The agreement that the Sioux accepted in return for peace under Fort Laramie Treaty of 1868 was that they would settle within the Black Hills reservation that lied in the Dakota territory. This agreement brought peace between the Sioux and the whites.
I definitely would say the answer but i can because i got it wrong but its not A He created a new type of math for building. I did what i could but i cant find the answer.
They were able to produce more than they had previously started out with. for example, settlers came in and trade was even bigger. i hope this helped. if not i'm sorry.