Why Can Prokaryotic Population Numbers Be Magnitudes Larger Than Populations

Multiple Choice

Why can prokaryotic population numbers be magnitudes larger than populations of multicellular eukaryotes?

A) Prokaryotes are small only.
B) Prokaryotes are small and have short generation times only.
C) Prokaryotes reproduce by binary fission,often have short generation times,and have cell walls primarily made of cellulose.
D) Prokaryotes are small,reproduce by binary fission,and often have short generation times.