What Is the Primary Mechanism Associated with the Role of Fluoride

What is the primary mechanism associated with the role of fluoride in prevention of dental caries?

A) Fluoride increases calcium absorption,which increases crystal formation of teeth
B) Decay is inhibited due to neutralization of organic acids produced by bacteria on the teeth
C) Decay is reduced due to the inhibitory effects of fluoride on growth of bacteria on the teeth
D) Fluoride becomes incorporated into the crystalline structure of teeth,making them less susceptible to decay