**Core Concept**
Traumatic brain injury (TBI) can cause uncal herniation due to increased intracranial pressure (ICP), resulting in ipsilateral pupillary dilation and contralateral hemiparesis. Early recognition and management of this condition are crucial to prevent further brain damage.

**Why the Correct Answer is Right**
The correct answer involves the management of increased ICP due to uncal herniation. This is achieved by ensuring adequate oxygenation and ventilation, followed by rapid-sequence intubation (RSI) to avoid further increases in ICP during the intubation process. The use of intravenous mannitol or hypertonic saline may also be considered to reduce ICP. In this scenario, the patient's dilated pupil suggests impending herniation, necessitating immediate action to prevent further brain damage.

**Why Each Wrong Option is Incorrect**

* **Option A:** This option is likely incorrect as it does not directly address the management of increased ICP or uncal herniation.
* **Option B:** While imaging is essential in the management of TBI, it is not the most important step in initial management, especially in a patient with signs of impending herniation.
* **Option C:** This option may be incorrect as it does not take into account the patient's unstable condition and the need for immediate intervention to prevent further brain damage.

**Clinical Pearl / High-Yield Fact**
In cases of suspected uncal herniation, a dilated pupil is a red flag for impending herniation, and prompt action to reduce ICP is essential to prevent further brain damage.

**Correct Answer:** C. Rapid-sequence intubation to prevent further increases in ICP during the intubation process.