As a Serious Dancer, Justine Watches What She Eats

As a serious dancer, Justine watches what she eats. She knows that she is underweight, but fears that if she starts eating more that she will become obese. In addition to a preoccupation with food she has also stopped menstruating. Her behaviors suggest that she might be suffering from ________.

A) anorexia nervosa
B) bulimia nervosa
C) compulsive exercise
D) phobic disorder