A nurse is caring for a client who has narcissistic personality disorder. Which of the following treatments should the nurse recommend?

The correct answer is B: Schema-focused therapy. This therapy is effective for treating narcissistic personality disorder as it targets the underlying maladaptive schemas and core beliefs that contribute to the disorder. By addressing these deep-seated patterns, individuals can develop healthier ways of thinking and behaving. Assertiveness training (A) may not be as effective for addressing the core issues of narcissistic personality disorder. Response prevention therapy (C) is typically used for anxiety disorders, not personality disorders. Cognitive behavioral therapy (D) can be helpful but may not specifically target the underlying schemas in the same way as schema-focused therapy.