Jupiter and the Other Jovian Planets Are Sometimes Called "Gas

Jupiter and the other jovian planets are sometimes called "gas giants." In what sense is this term misleading?

A) They actually contain relatively little material in a gaseous state.
B) The materials they are made of are not the kinds of thing we usually think of as gases.
C) They are not in any sense "giants."
D) Actually, it's a great description, because these worlds are big and gaseous throughout.