You Are Swimming on a Beach in the Surf

Multiple Choice

You are swimming on a beach in the surf. You leave your cooler and supplies on the beach, and after a half hour you swim back to shore, but your stuff isn't there. You look along the beach and see your cooler 200 m down the beach. How did that happen?

A) You must have had too many and just lost track of where you were.
B) You were affected by the longshore current and drifted with it along the coast.
C) You must have gotten caught in a rip current without knowing it.
D) You must have been swimming parallel to the shore without thinking about it.