What Creates Caverns in Limestone Rock

What creates caverns in limestone rock?

A) Underground streams erode the walls of the channels they flow through.
B) Limestone is deposited as a sediment, and caverns exist where organic material was trapped and decomposed.
C) Earthquakes create gaps at weak boundaries in the limestone.
D) Limestone dissolves in the presence of salt, and creates caverns when located under the sea.
E) Acidic rainwater dissolves limestone rock, leaving empty caverns.