I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I? - A riddle that happens to come with free points :)

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