The correct option is
B Bacterial Infections
Dental caries, which are also referred to as tooth decay or cavities, are one of the most common and widespread persistent diseases today and are also one of the most preventable. When we eat certain foods, the bacteria on the teeth break them down and produce acids that have the ability to seriously damage the hard tissues of the tooth. The result is the formation of dental caries (cavities).
So, the correct option is 'B" (Bacterial Infections).