Why did chinese believe the tang struggled with crop failures and government problems?

How is the vietnam war connected to the cold war?

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

Why is it important that dr. luther king jr. use non-violent protest to create social change?