When considering Bulimia Nervosa, an episode is characterized by both of the following

Reasoning: Choice A reason: This description partially overlaps with bulimia but is more indicative of the binge-eating/purging subtype of anorexia nervosa. Bulimia specifically requires the presence of a binge episode involving an objective large amount of food, whereas restrictive disorders focus primarily on the suppression of intake regardless of binge size. Choice B reason: Denial of the medical seriousness of low body weight is a core diagnostic criterion for anorexia nervosa under the DSM-5. Patients with bulimia nervosa are typically within a normal weight range or slightly overweight and are generally more distressed by their behaviors than those with restrictive anorexia. Choice C reason: Bulimia nervosa is defined by recurrent episodes of binge eating. An episode must involve eating an amount of food significantly larger than what most people would eat in a discrete period and must be accompanied by a psychological sense of losing control during the ingestion process. Choice D reason: Amenorrhea and a body weight below 85% of the expected ideal are classic clinical markers for anorexia nervosa. While bulimic patients may have irregular cycles, the specific weight threshold of <85% excludes a primary diagnosis of bulimia nervosa, which typically presents with normal body mass.