What is the origin and meaning of the iron curtain?

What does it mean in the declaration of independence for cutting off our trade with all parts of the world

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

How much did inflation increase during president carter’s term?