bacteria. acidic food. allergies. genetic defects.
I gave my students this multiple choice question: Tooth decay is an infection that causes deterioration of the protective enamel on teeth, resulting in damage. Tooth decay is most likely caused by

Only one answer is correct among these 4 choices:
- bacteria.
- acidic food.
- allergies.
- genetic defects.

Could you tell me which one is correct?

bacteria.