What organization masterminded the september 11, 2001 terrorist attacks on the united states?

Which of following most accurately describes china today?

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

Which best expresses the radical republican philosophy of reconstruction?