After the last Ice Age ended, many nomads moved into areas with a milder climate and fertile land. As a consequence , *blank* eventually replaced hunting and gathering as a main source of food

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