How did the Comanche resist the terms of the Medicine Lodge Creek Treaty?

A.
by relying on government rations and raiding

B.
by refusing to send their children to Carlisle school

C.
by attacking General Custer’s troops at Little Bighorn

D.
by selling stolen cattle to the Union Army during the Civil War

I know it's not D or C, A doesn't make too much sense so I think it's B, but I could be wrong though.