A nurse is caring for a client who states, "I smoke because I have a lot of anxiety." The nurse should recognize the client's statement as which of the following defense mechanisms?

A. Projection: Projection involves attributing one’s own undesirable feelings or thoughts onto others. This is not applicable here, as the client is not projecting their behavior onto someone else. B. Sublimation: Sublimation is the process of channeling negative or unacceptable impulses into socially acceptable activities. Smoking due to anxiety is not an example of channeling impulses into a productive or acceptable activity. C. Rationalization: Rationalization is a defense mechanism where a person justifies or makes excuses for their behavior or feelings. In this case, the client is justifying smoking as a way to manage anxiety, which is a classic example of rationalization. D. Dissociation: Dissociation involves a detachment from reality or a separation of thoughts, identity, or consciousness, typically as a coping mechanism in response to trauma or stress. It is not applicable in this situation, where the client is not detaching from reality.