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