When E Coli Host Strain K-12 Is Infected by Phage Lambda

Multiple Choice

When E. coli host strain K-12 is infected by phage lambda K, the phage DNA is

A) recognized as foreign and cleaved by a specific restriction endonuclease.
B) recognized as foreign and marked with a methylation pattern.
C) not recognized as foreign because it has the same methylation pattern as the E. coli genome
D) not recognized as foreign because of the phage restriction and modification system.