## Core Concept
CSF rhinorrhea refers to the leakage of cerebrospinal fluid (CSF) through the nose, often resulting from a breach in the dura mater and the bones of the anterior cranial fossa. The immediate management of CSF rhinorrhea aims to prevent further complications such as meningitis.

## Why the Correct Answer is Right
The correct approach for immediate management involves conservative measures to reduce intracranial pressure and prevent further CSF leakage. This typically includes:

- **Bed rest**: To minimize physical strain.
- **Elevation of the head**: To decrease intracranial pressure.
- **Avoidance of straining activities**: Such as heavy lifting, bending, or blowing the nose.
- **Avoidance of constipation**: Through a high-fiber diet or laxatives if necessary.

## Why Each Wrong Option is Incorrect
**Option A:** Incorrect because immediate surgical intervention is usually not required unless there's a significant associated injury needing repair or signs of increased intracranial pressure or infection.

**Option B:** This option might seem plausible but often isn't specified as an immediate step without further context on what "B" entails.

**Option C:** This could potentially be a treatment but usually isn't the immediate step; it's more of a diagnostic or specific therapeutic approach.

**Option D:** While certain medications might be used in specific contexts, immediate management primarily focuses on conservative measures.

## Clinical Pearl / High-Yield Fact
A key clinical pearl is that patients with CSF rhinorrhea are at increased risk of developing meningitis. Therefore, immediate antibiotic prophylaxis may be considered in some cases, although this is not universally recommended and depends on the clinical scenario.

## Correct Answer Line
**Correct Answer: C. Conservative management.**