Answer:
The correct answer is D: The Royal Proclamation of 1763.
Step-by-step explanation:
After the new territories had been acquired from France after the Seven Year War, King George III issued a Royal Proclamation, known as the Royal Proclamation of 1763, in which he prohibited settlement of people west of the Appalachian Mountains, declaring such land as an Indian Reservation, and with it denying an earlier promise made to those who fought for the Crown against the French.