Both anorexia and bulimia can be treated by:

The correct answer is B. Psychological therapy.

Both anorexia and bulimia are eating disorders that can significantly affect mental health. Psychological therapy, such as cognitive-behavioral therapy, is effective in helping individuals understand and change their unhealthy eating behaviors and thoughts. While medications can assist some patients, psychological therapy is considered a primary treatment approach for these disorders. Dieting and personal trainers do not address the underlying psychological issues related to the disorders.