Which of the following BEST describes the SOS response?

A) DNA damage by UV light causes a λ lysogen to be induced to the lytic life cycle.
B) It is an error prone DNA repair system.
C) Activation of RecA by sensing DNA damage and single-stranded DNA.
D) Coordinated activation of a set of unlinked genes whose protein products will collectively help the cell to respond to environmental damage.
E) Transcriptional depression by proteolytic cleavage of the LexA repressor.