Construction of a Seawall Produces an Effect Analogous to What

Construction of a seawall produces an effect analogous to what kind of natural coastal feature?

A) a sea cliff producing erosion at the base of the sea cliff (i.e.,the seawall)
B) an island offshore breaking waves and trapping sand behind to form a tombolo
C) a barrier island,which forms an artificial beach at the front of the seawall
D) a spit,formed by sand moving by longshore drift accumulating along the opening of a tidal channel