You are answering a USMLE-style medical question. Question: A 17-year-old girl is referred by her dentist for a suspected eating disorder. She has been visiting the same dentist since childhood and for the past 2 years has had at least 2 visits for dental caries. She eventually admitted to him that she regularly induces vomiting by putting her fingers down her throat. She says she has been doing this for the last few years and purging at least once a week. More recently, she has been inducing emesis more often and even looked into diuretics as she feels that she is gaining more and more weight compared to her ‘skinny friends’. Her BMI is at the 50th percentile for her age and sex. Which of the following features is most consistent with this patient’s condition? Options: A) Patients with this disorder are not further sub-typed B) Patients do not usually initiate treatment C) Patients can have a history of both anorexia and bulimia D) Patients will typically have a BMI between 17–18.5 kg/m2 Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.