Answer:
A) they acted as a barrier to further settlement to the west
Step-by-step explanation:
The Proclamation Line of 1763 was drawn by the British along the Appalachian Mountains. The purpose, they said, was to protect the American colonists, though the actual reason probably had more to do with wanting to ‘keep an eye’ on them. Therefore, the mountains were a they acted as a barrier to further settlement to the west.