Which of the following most likely indicates that sea level has fallen relative to the land?

A) offshore sand bars that have become coastal dunes
B) the presence of coral reefs on land
C) wave-cut notches and platforms that are above sea level
D) marine terraces
E) all of these

All of these options indicate that sea level has fallen relative to the land. Offshore sand bars becoming coastal dunes, the presence of coral reefs on land, wave-cut notches and platforms above sea level, and marine terraces are all features that suggest a relative drop in sea level, exposing these features above the current sea level.