In a 6-hour-old snake bite with only mild local edema and no systemic signs or lab abnormalities, the risk of severe envenoming is low. Early intervention with antivenom is indicated only if there are signs of systemic toxicity or progression of symptoms. Since the patient is stable and no evidence of systemic involvement is present, observation is safe and appropriate. Antivenom (even IV) carries risks of adverse reactions and is not needed in mild, localized cases without progression. Incision and suction are not indicated without clinical signs of tissue damage or systemic involvement. Local subcutaneous antivenom is not standard and lacks evidence in such mild cases.

**✓ Correct: B. Wait and watch**