Which Is an Example of Binge Eating Disorder

Which is an example of binge eating disorder?

A) Kayla is preoccupied with being thin and has begun to starve herself to achieve this body type.
B) Kayla eats away from everyone else and feels out of control while eating large amounts of food.
C) Kayla eats uncontrollably and then uses laxatives to rid her body of the food she just ingested.
D) Kayla is substantially lower in weight for her height and age while still seeing herself as "heavy."