**Core Concept**
Anorexia nervosa is a complex eating disorder characterized by a distorted body image and restrictive eating habits, leading to significant weight loss and potential nutritional deficiencies. Treatment for anorexia nervosa involves a multidisciplinary approach, including pharmacological interventions, psychotherapy, and nutritional counseling.

**Why the Correct Answer is Right**
The primary goal of treatment is to restore a healthy weight, normalize eating habits, and address the underlying psychological issues contributing to the disorder. Pharmacological interventions, such as selective serotonin reuptake inhibitors (SSRIs), may be used to manage comorbid depression, anxiety, or obsessive-compulsive symptoms. However, the most effective treatment for anorexia nervosa is a combination of psychotherapy, including cognitive-behavioral therapy (CBT) and family-based therapy (FBT), and nutritional counseling to promote a healthy weight and eating habits.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because while some medications may be used as adjuncts to treatment, they are not the primary treatment for anorexia nervosa.
* **Option B:** This option is incorrect because while SSRIs may be used to manage comorbid symptoms, they are not the primary treatment for anorexia nervosa.
* **Option C:** This option is incorrect because while nutritional counseling is an essential component of treatment, it is not the sole treatment for anorexia nervosa.

**Clinical Pearl / High-Yield Fact**
It's essential to note that the treatment of anorexia nervosa requires a comprehensive approach, involving a multidisciplinary team of healthcare professionals, including psychiatrists, psychologists, nutritionists, and primary care physicians. Early intervention and a supportive treatment environment can significantly improve outcomes.

**Correct Answer:** C. Nutritional counseling.