What did events like the Walking Purchase prove about treaties between Europeans and Native Americans? They would last longer than most treaties.
They were more effective than treaties in Europe.
They mostly served European interests.
They had the power to prevent or put off war.

How does the supremacy clause of the u.s. constitution affect the states? o a. it requires each state to establish a supreme court. b. it declares that the federal government can take away state powers if necessary. o c. it allows state governments to overthrow the federal government if necessary. o d. it ensures that the u.s. constitution overrules each state constitution