Why Isn't Bacterial DNA Digested by the Restriction Enzymes Bacteria

Why isn't bacterial DNA digested by the restriction enzymes bacteria produce?

A) The sequence recognized and cleaved by a restriction enzyme is not found in the bacterial genome.
B) Bacterial cells have high concentrations of ligase which immediately repairs the any sites that are cleaved.
C) Methyl groups added to the bases of restriction enzyme recognition sites within the bacterial chromosome block cleavage.
D) Bacterial DNA is modified with phosphate groups that prevent the function of restriction enzymes.
E) Restriction enzymes are found in the cytoplasm and DNA is only in the nucleus.