Susan, a woman of relatively normal weight, sometimes eats huge quantities of junk food with no ability to stop herself. She follows this with long periods of complete fasting. Based on this information, Susan would
be diagnosed with bulimia nervosa.

Susan would be diagnose with bulimia.

Explanation:

Bulimia is an eating desorder which affects people with a bahavior of eating a great deal of food at certain moments, with no possibility of stoping or managing to control themselves. This comes with periods of not eating anything, and then eating until they feel very bad.