You are standing above a 20 m high sea cliff with a large beach below you. All around you is a flat surface with thin soil on a rocky base. In the distance you see another flat bench but it is about 30 m higher than you are. Where are you?

A) on a dune field behind an active shorelineB) on a subsiding coastline where a recent earthquake happened to uplift the seabedC) on an uplifted wave-cut terrace along an emergent coastlineD) You must be on the moon; there is nothing like that on Earth.