Lactobacilli are numerous in carious lesions because they
a They are the main causative agent
b can produce insoluble extracellular polysaccharides
c can attach to smooth enamel surfaces
d are more violently cariogenic for animals than Streptococcus mutans
e are secondary invaders: (A) abcd are false e is true, (B) abc are false d e are true, (C) ab are false c d e are true, (D) a is false bcde are true
Answer is A. None