Which of These Might Be Consequences of a RecA Mutation

Which of these might be consequences of a recA mutation in the absence of DNA damage?

A) too much SOS response causing increased mutation within the genome
B) too little SOS response causing increased mutation within the genome
C) too much SOS response causing reduced mutation within the genome
D) too little SOS response causing reduced mutation within the genome
E) none of these would be a consequence of a recA mutation