Factors such as low salivary buffering capacity, high incidence of bacteria, and an above-average plaque index contribute to an acidic environment around the tooth's enamel that may cause cavities, although this does not occur evenly in all cases.
A. contribute to an acidic environment around the tooth's enamel that may cause cavities, although this
B. may cause cavities by contributing to an acidic environment around the tooth's enamel, but this cavity formation
C. contributes to an acidic environment around the tooth's enamel that may cause cavities although this
D. may cause cavities by contributing to an acidic environment around the tooth's enamel, but this cavity formation would not
E. contribute to an acidic environment around the tooth's enamel that may cause cavities, although bacteria