The Overall Interior Structure of Jupiter and Saturn Is Expected

The overall interior structure of Jupiter and Saturn is expected to be

A) three-layered: a large,solid,inner core of rock,a liquid outer core of "ices," and an extensive gaseous,hydrogen-rich atmosphere.
B) four-layered: a solid iron inner core,a liquid iron outer core,a partially molten mantle of rock,and a solid crust.
C) a ball of hydrogen and helium of gradually increasing density inward from gas to liquid to solid.
D) four-layered: a rocky inner core,a liquid outer core of "ices," a mantle of liquid hydrogen and helium,and an extensive gaseous atmosphere.