How Does a Bacterial Cell Protect Its Own DNA from Restriction

Multiple Choice

How does a bacterial cell protect its own DNA from restriction enzymes?

A) by adding methyl groups to adenines and cytosines
B) by using DNA ligase to seal the bacterial DNA into a closed circle
C) by adding histones to protect the double-stranded DNA
D) by forming "sticky ends" of bacterial DNA to prevent the enzyme from attaching
E) by reinforcing the bacterial DNA structure with covalent phosphodiester bonds