The Downcoast Transport Mechanism for Beach Sand Along Much of the Pacific

The downcoast transport mechanism for beach sand along much of the Pacific coast is called:

A) the longshore current, a current that moves sand north-to-south along the coast, parallel to shore, at a great distance away from land.
B) the longshore current, a current that moves sand south-to-north along the coast, parallel to shore, at a great distance away from land.
C) the longshore current, a current that moves sand north-to-south along the coast, parallel to shore, close to shore.
D) the longshore current, a current that moves sand south-to-north along the coast, parallel to shore, close to shore.