How Do Bacteria Avoid Destroying Their Own DNA with Their

How do bacteria avoid destroying their own DNA with their restriction endonucleases?

A) Bacterial restriction endonucleases only affect virus and eukaryotic DNA and do not affect bacterial DNA
B) Bacteria do not have the recognition sequences for their own restriction endonucleases in their genome.
C) Restriction endonucleases cannot penetrate the bacterial nuclear membrane
D) Bacteria methylate restriction endonuclease recognition sites in their own genome