A nurse is caring for a client on a psychiatric unit following a medically stabilized suicide attempt involving sedatives and alcohol. The client has a history of major depressive disorder, alcohol use disorder, and anorexia nervosa. The client remains withdrawn, avoids eye contact, and responds with, "I don't see the point of anything.” Which of the following is the nurse's priority intervention for suicide prevention at this stage of care?

A. Encourage participation in group therapy to build support and engagement: Group therapy may be helpful later, but a withdrawn client with active suicide risk needs immediate safety measures, not therapeutic engagement as a first priority. B. Initiate a contract for safety and document the client's agreement: Safety contracts are not reliable for preventing suicide because they do not ensure actual safety and should never replace direct observation for a highrisk client. C. Place the client on one-to-one observation with a staff member always present: One-to-one observation is the priority because the client shows withdrawal, hopelessness, and multiple highrisk factors, requiring continuous monitoring for immediate suicide prevention. D. Remove mirrors and weigh the client only with clothing for eating disorder privacy: These interventions apply to anorexia management but do not address the urgent suicide risk that takes precedence in this situation.