Even Though Bacteria Are More Simple Than Eukaryotes,genomic Data on Bacteria

Even though bacteria are more simple than eukaryotes,genomic data on bacteria was surprising because _____.

A) very few species contain plasmids
B) there is only one copy of each gene present within a bacterial genome
C) there are many genes of unknown function
D) bacterial genomes are always contained on a single circular chromosome
E) there is almost no difference between the genomes of diverse bacteria