**Core Concept:** Flail chest is a clinical condition characterized by three or more adjacent ribs fractured in a single area, leading to a segment of the chest wall that moves excessively upon respiration, causing pain and potentially injuring the lung.

**Why the Correct Answer is Right:** The correct answer is to immobilize the fractured ribs to prevent further injury and promote healing. In a stable patient, the treatment involves:

1. **Correct Answer: C. Surgical fixation (stabilization) and immobilization of the fractured ribs using plates, wires, or screws.** This intervention prevents excessive movement of the fractured ribs, reduces pain, and minimizes lung injury.
2. **Option A (Non-surgical management):** Non-surgical management is usually recommended for unstable patients with severe chest trauma, but in this case, the patient is stable, making surgical intervention the appropriate choice.
3. **Option B (Analgesia):** Pain management is essential in patients with flail chest, but providing analgesia alone does not address the mechanical problem caused by the fractured ribs.
4. **Option D (Rest):** Rest is important generally for chest trauma patients, but in a stable patient with flail chest, surgical intervention is the primary treatment modality.

**Why Each Wrong Option is Incorrect:**

1. **Option B (Analgesia):** Pain management is crucial, but it does not address the mechanical issue of fractured ribs causing excessive movement and lung injury.
2. **Option D (Rest):** Rest is essential in chest trauma patients, but in a stable patient with flail chest, surgical intervention is the primary treatment.
3. **Option A (Non-surgical management):** Surgical fixation is recommended for unstable patients; in a stable patient, surgical management is necessary.
4. **Option D (Rest):** Rest is essential in chest trauma patients, but surgical intervention is the primary treatment for a stable patient with flail chest.

**Clinical Pearl:** Flail chest is a critical issue in chest trauma patients, and the correct management depends on the patient's stability. Surgical fixation is crucial for stabilized patients to prevent further lung injury and promote healing.