Many clinicians suggest that the most difficult part of treatment for anorexia nervosa, and the part of treatment where many anorexic individuals are not successful, is

The correct answer is changing their attitudes regarding body and self image. 
The clinicians can easily fix what's on the outside, but fixing a person's brain and thoughts is not such an easy job. It is important for people suffering from anorexia nervosa to understand that their body is beautiful and that they shouldn't starve themselves to death in order to change that.

Who knows, do another question and send it to me