Oral bacteria and dietary sugars are two of the three parts of the "Etiology Triad" ofEarly Childhood Caries. What is the third part of the triad?
A. The enamel and dentine of teeth which is vulnerable to demineralization
B. Bacterial toxins which attach the teeth's calcium matrix
C. Saliva which provides a moist environment for the cariogenic oral bacteria
D. Genetic predisposition to colonization by cariogenic oral bacteria