[A]
archaebacteria that contain protein homologous to eukarytic core histones
[B]
archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
[C]
bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
[D]
bacteria that contain a cytoskeleton and ribosomes