The correct option is C was intended to stop colonist from settling west of the Appalachian mountains
After the end of the French and Indian war which ceded the territory of the Ohio river valley to the British, there was a proclamation made in 1763 to stop the colonists from moving into the land occupied by the Native Americans in order to avoid further conflicts. The Appalachian Mountains marked the boundary for the ceded territory and the colonists were not to settle west of this boundary.