The nurse notes that a client with a history of self-mutilation has increased body tension and is pacing in the hallway. Which nursing intervention is most important at this time?

Complete a thorough room search to ensure the client does not have access to objects that can be used for self-harm.

Provide the client time alone in the client's room to reduce external stimulation and promote relaxation.

Alert the assigned staff to closely monitor the client and intervene as needed to reduce the risk of self-mutilation.

Give the client firm, consistent expectations that self-mutilating behaviors are unacceptable and will not be allowed.