A client who has agoraphobia is beginning desensitization with the therapist, and the nurse is reinforcing the process. Which intervention has the highest priority for this client's plan of care?

A. Establishing trust by providing a calm, safe environment is crucial for clients with agoraphobia, as it lays the foundation for effective therapeutic interventions and supports the client's sense of safety and security. B. Encouraging deep breathing is a helpful coping strategy, but it may not be the highest priority compared to establishing trust and safety. C. Progressively exposing the client to larger crowds is part of desensitization therapy, but it should be done gradually and only after trust and rapport have been established. D. Encouraging substitution of positive thoughts for negative ones is a valuable cognitivebehavioral technique, but it may be more effective once the client feels safe and supported in the therapeutic environment.