If You Go to a Beach in the Continental United

Multiple Choice

If you go to a beach in the continental United States and you are standing on a long,flat strand of sand,and you look away from the open ocean and see only a few low sand dunes and then a large,open waterway,where are you?

A) on a surfing beach in California
B) on a the Oregon coast at the mouth of river
C) on a barrier island on the Florida Gulf Coast
D) You must be on a Pacific Island; there is nothing like that on U.S.coastlines.