When digested by lipase fats are converted into fatty acids. The presence of fatty acids can decrease the pH or increase the acidity of the solution (hence the name fatty ACID).
Yes, there is a variety of things you can do to wear down the enamel. A few of the biggest things are: Drinking Coffee or soda, eating acidic foods and not brushing your teeth. Sadly you are not able to grow back your enamel after if it fully gone so it's best to protect your enamel as much as possible.
I believe the answer is A. Because there are other kids in school, socialization for children is much easier
