The bill of rights was added to what important united states document?

The Constitution

At the Constitutional Convention of 1787, delegates rejected a motion made by George Mason, author of the Virginia Declaration of Rights (1776), to preface the Constitution of the United States with a bill of rights.

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.

yup! you are correct it is b.