A nurse is caring for a client with schizophrenia who expresses intent to harm a former partner. Which of the following actions by the nurse best demonstrates application of the "duty to warn exception to client confidentiality?

Informing hospital security and placing the client on one-to-one observation

Documenting the client's statement and notifying the healthcare team at shift change

Discussing the threat with the client's family to gain insight into past behavior

Reporting the threat to law enforcement and initiating steps to notify the intended victim