A client who recently lost their spouse exhibits signs of withdrawal, expresses feelings of hopelessness, and reports difficulty sleeping and eating. Which stage of grief is the client most likely experiencing, and what is the nurse's most appropriate intervention?

Anger: encourage the client to express feelings toward family members.

Denial: gently provide information to help the client acknowledge the loss.

Acceptance: assist the client in planning for future goals and activities.

Depression: offer empathetic support and assess for risk of self-harm.