Ellen Is at a Normal Weight for Her Height but Wants

Ellen is at a normal weight for her height but wants to be slimmer. She often diets, but after a few days loses control and begins to binge eat. To compensate for the amount of food she takes in, she purges by vomiting. This cycle lasts for a few days to a week, and then starts over again. Ellen suffers from:

A) bulimia nervosa.
B) anorexia nervosa.
C) pica.
D) obesity.