Answer:
D) The government gets it's authority from the people
Explanation: The preamble begins "We the People", because it is stating the importance of the people in the United States government. The whole point of the American Revolution is the goal of creating a government that works by the "consent of the governed" and that gives power to the people.
Of course, this would not be stating that the United States is on its own, they make plenty of allies during the Revolution, and the Founding Fathers would never be a replacement for the king, since they are fighting against the idea of a Monarchy.