Rationale: A. Administer disulfiram: Disulfiram is used to deter alcohol consumption by causing unpleasant effects when alcohol is consumed. It has no therapeutic use in the treatment of gambling disorders and would not address the behavioral or psychological components involved. B. Encourage participation in exposure therapy: Exposure therapy is typically used for anxiety disorders, such as phobias or post-traumatic stress disorder. It is not a standard treatment for gambling disorder, which requires cognitive and behavioral interventions tailored to impulse control. C. Administer memantine: Memantine is primarily used to manage symptoms of Alzheimer’s disease and is not an approved or evidence-based treatment for gambling disorder. Its mechanism of action is unrelated to the neurobiology of behavioral addictions like gambling. D. Recommend client join a self-help group: Self-help groups like Gamblers Anonymous provide peer support and structured recovery programs that address compulsive gambling behaviors. Participation can foster accountability, emotional support, and behavioral change, making this a relevant and effective nursing intervention.