E equals MC² or something like that lol
I believe it is D because it's not a,b and I'm pretty sure it's not c
They moved around (though the cowboys were herding cattle, whereas the Native Americans were following the buffalo). They cared for the cattle (eg by bog-riding and from line-camps) in a way similar to the way Native American dog-soldiers cared for the buffalo.
Answer:
The causes were that there was lack of money. There were huge debts from the Revolutionary War. The government paid the soldiers that fought in the war a worthless amount. It removed the influence of Articles of Confederation from citizens/people.