Which of the following was a major cause for the growth of cities throughout Afro-Eurasia from 800 C. E. to 1350 C. E.?

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