Answer:
C, By issuing the Proclamation of 1763
Explanation:
The Royal Proclamation of 1763 was issued by King George III on October 7, 1763, following Great Britain's acquisition of French territory in North America after the end of the French and Indian War and the Seven Years' War. This proclamation rendered all land grants given by the government to British subjects who fought for the Crown against France worthless. It forbade all settlement west of a line drawn along the Appalachian Mountains, which was delineated as an Indian Reserve.