Twenty-two-year-old Tawana is slightly overweight and loves to eat, particularly snack foods and rich desserts. Fearful of becoming overweight, she frequently takes a laxative following episodes of binge eating. Tawana most clearly suffers from:

A)bulimia nervosa.
B)anorexia nervosa.
C)excess PYY.
D)an abnormally high set point.
E)hypermetabolism.