A Teenager Has Recently Developed Signs of Bulimia Nervosa

A teenager has recently developed signs of bulimia nervosa. She has been binge eating alone in her room and vomits immediately afterward to try to control her weight. Why will this not result in sustainable weight loss?

A) Purging increases hunger, which decreases metabolism and triggers more frequent binges.
B) Calorie absorption occurs almost instantaneously, with 80 to 90 percent of calories being absorbed before vomiting occurs.
C) With each incident of self-induced vomiting, it becomes more difficult to trigger the vomiting reflex.
D) Vomiting increases sodium levels, which results in water retention.