A nurse is caring for a client who has Alzheimer's disease. The nurse discovers the client entering the room of another client, who becomes upset and frightened. Which of the following actions should the nurse take?

Attempt to determine what the client was looking for.

Ask the client to apologize for his behavior.

Reprimand the client for invading the other client's privacy.

Explain the client's Alzheimer's diagnosis to the frightened client.