The client slamming the door after an argument with his significant other is an example of the defense mechanism called "C. Acting out."
Here's why:
1. **Acting out:** This defense mechanism involves expressing emotional conflicts or feelings through actions rather than words. In this case, slamming the door is a physical action that represents the client's emotional response to the argument.
2. **Conversion:** Conversion involves experiencing psychological stress in the form of physical symptoms, such as a conversion disorder where emotional stress manifests as a physical symptom (e.g., paralysis). This doesn't apply to the situation described.
3. **Repression:** Repression is the unconscious blocking of unpleasant emotions or impulses. While it could be related to the situation, the act of slamming the door is more of an outward expression rather than internal suppression.
4. **Displacement:** Displacement is when emotions are redirected from the original source to a less threatening target. In this case, the client is not redirecting the emotions onto a different target but rather expressing them through the action of slamming the door.
Therefore, the most suitable defense mechanism exhibited in this scenario is "C. Acting out."
