Final answer:
King George III enforced the Proclamation of 1763 by keeping 10,000 soldiers in the colonies to maintain control and prevent westward expansion past the Appalachian Mountains. This was separate from the Sugar Act, which aimed at raising revenue and reducing smuggling.
Step-by-step explanation:
The correct answer to this is B. He kept 10,000 soldiers in the colonies. This measure was one of several attempts by the British government to tighten its control on the American colonies after the French and Indian War. The presence of British troops was meant to enforce the boundary line set by the Proclamation, which prevented colonists from settling west of the Appalachian Mountains. It was also a demonstration of Britain's authority over the colonies and a deterrent against expansion and conflict with Native Americans.
The Proclamation of 1763 was indeed enacted in part as a response to Pontiac's War, which is true. The Sugar Act, another measure aimed at asserting British control and raising revenue, succeeded the Molasses Act of 1733 but with stronger enforcement to prevent smuggling and raise revenue rather than just regulate trade. However, the enactment of the Sugar Act and the presence of British troops were separate measures; British soldiers were not explicitly tasked with enforcing the Sugar Act, though they were stationed in the colonies during this period of heightened control and tension leading up to the Revolutionary War.