Amber is slightly above her normal weight. She feels that she has no control over her eating and often consumes large quantities of food in only an hour or so. Amber then either makes herself vomit or resorts to excessive exercise or fasting to prevent weight gain.
From these observations, it appears that Amber is suffering from:

a. anorexia nervosa.
b. bulimia nervosa.
c. the taste aversion paradox.
d. the behavioral dieting syndrome.

The correct answer is letter B

Bulimia is a disorder that is characterized by recurrent and uncontrollable episodes of consuming large amounts of food, usually with a high calorie content, followed by inappropriate reactions to prevent weight gain, such as inducing vomiting, use of laxatives and diuretics, fasting prolonged and exhaustive practice of physical activity.

In people with bulimia, it is not thinness that draws attention. In general, they are young women with sculptural bodies, who care for him obsessively. They follow strict diets. Suddenly, they lose control and eat an absurd amount of food, most of the time, on the sly. Then they are filled with feelings of remorse or guilt.

The resources they use to not put on weight cause complications in the body. For example: destruction of tooth enamel, sore throat, bleeding, gastrointestinal problems, cardiac arrhythmias, dehydration etc.