The correct answer is (C) headland; a point of land jutting out into a sea or body of water; a high point of land projecting beyond the coastline into the body of water. Also, a part of a plateau, or bluff, that overlooks a lowland.

Promontory comes from Latin promontorium

Examples of use:

• Monaco stands on a promontory of rock on the Mediterranean coast
• From the tip of the promontory, I viewed the coastline.