A Recent Book by a Reputable Biologist Suggests There Is

A recent book by a reputable biologist suggests there is a deep,hot,acidic biosphere under the Earth's crust that may have more biomass than all life at the Earth's surface.What type of organisms would most likely be found in this deep biosphere?

A) primitive animals
B) primitive heat-loving plants
C) fungi living on the detritus from above
D) thermoacidophilic archaea
E) viruses