In traumatic facial nerve injury, early and accurate repair of the nerve is crucial to preserve facial function. While conservative management (C) may be used in mild cases, traumatic injuries often involve significant nerve disruption requiring surgical intervention. Facial sling (A) is used for temporary support but not definitive treatment. Systemic corticosteroids (D) reduce inflammation but do not restore nerve function. Facial nerve repair (B) directly addresses the injury, promotes nerve regeneration, and restores motor function.

**✓ Correct: B. Facial nerve repair**