A nurse is planning care for a client who has anorexia nervosa. The nurse should make which of the following client goals the priority?

The correct answer is C: Preventing fluid and electrolyte imbalance. This is the priority goal because individuals with anorexia nervosa are at high risk for dehydration, electrolyte imbalances, and cardiac complications due to severe restriction of food intake. Addressing fluid and electrolyte balance is crucial for the client's physical health and safety. Monitoring for self-harm thoughts (B) and fostering self-respect (D) are important but secondary to the immediate physiological needs of the client. Encouraging group therapy (A) is beneficial for long-term treatment but not as critical as addressing the client's physical health in the immediate term.