**Core Concept**
Anorexia nervosa is a complex eating disorder characterized by restrictive eating patterns, significant weight loss, and a distorted body image. Effective management of anorexia requires a multidisciplinary approach, including nutritional rehabilitation, psychological counseling, and medical monitoring to prevent complications.

**Why the Correct Answer is Right**
The management of anorexia involves restoring a healthy weight, improving nutrient deficiencies, and addressing psychological comorbidities. Patients with anorexia often require supplementation with electrolytes, vitamins, and minerals to correct deficiencies, particularly in potassium, magnesium, and vitamin B12. **Intravenous (IV) fluids and electrolyte replacement** are essential in the initial stages of treatment to prevent refeeding syndrome, a potentially life-threatening condition.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while oral nutritional supplements may be helpful, they are not sufficient to address the severity of malnutrition in anorexia patients.
**Option B:** This option is incorrect because while certain medications, such as antidepressants, may be used to treat comorbid depression or anxiety, they do not directly address the nutritional deficiencies or weight loss associated with anorexia.
**Option C:** This option is incorrect because while cognitive-behavioral therapy (CBT) is a useful tool in treating anorexia, it is not the primary approach for managing the acute nutritional deficiencies and weight loss.

**Clinical Pearl / High-Yield Fact**
In patients with anorexia, the risk of refeeding syndrome is highest in the first 48 hours of treatment. It is essential to closely monitor electrolyte levels and adjust nutritional intake accordingly to prevent this potentially life-threatening complication.

**Correct Answer:** C.