Final answer:
The King's Proclamation of 1763 prohibited the colonists from settling west of the Appalachian Mountains, leading to dissatisfaction and frustration among the colonists. Correct option is B.
Step-by-step explanation:
The King's Proclamation of 1763 changed colonial attitudes regarding England after the French and Indian War by prohibiting the colonists from settling west of the Appalachian Mountains.
This proclamation was introduced to prevent conflict with Native American tribes in the Ohio Valley and to avoid the costs of defending the frontier.
However, many colonists viewed this edict as a limitation on their freedom and disregarded it, leading to growing dissatisfaction with British rule.