I don't know are the advertisers racist?
They were pleased because this would keep the people from moving into their land
#3. A and C
#4. A.
I'm not too sure if this is correct but I hope this helps.
Actually, the civil war make their relationship became much worse.
Because of the civil war, the ally has to lose a lot of resources for war supplies and equipment. This led to a situation where the allies no longer able to pay the treaties that they promisd to pay to the Sioux, which eventually ended up in conflict between the two group.
