Which statement best describes the sumerian city-states?
each had a written code of laws.
each was located on the tigris river.
each was located in the mountains.
each had its own government.

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