Jordan is very afraid of gaining weight but she cannot control her eating habits. She has been making up for her eating binges by vomiting immediately after a meal or by purging with laxatives. This pattern of behavior has been occurring thrice a week for the past four months. Jordan is most likely suffering from:
A) anorexia nervosa.
B) bulimia nervosa.
C) sickle-cell anemia.
D) hypochondria.