Maria Claims to Never Have an Appetite

Maria claims to never have an appetite. She enjoys preparing food for others, but she never partakes in her creations, claiming she has already eaten. She is quite thin but tells her friends she needs to lose "just a few more pounds." Most days she is at the gym working out for two to three hours. She would best be described as suffering from

A) diabetes.
B) a low blood-sugar level.
C) anorexia nervosa.
D) bulimia nervosa.
E) binge-purge disorder.