Answer: Weak tooth enamel.
Explanation: Bulimia nervosa is a serious eating disorder that consists of eating large amounts of food and then purges to get rid of extra calories. As you might know, when you throw up, some acid in your stomach also goes out with the food. This stomach acid weakens your tooth enamel.
Rose should ask for help if somebody is near her so she can go to the nurse and go home and go to the hospital to get it checked.
A because none of the others would work
Breaking the body into systems is in most cases a lot easier for the students to understand instead of just doing it all at once
The answer would be carbohydrates
