When treating a survivor rescued from cold bay water who is suffering from moderate to severe hypothermia, which of the following is CRITICAL?

1. Give the victim hot rum or whisky to warm their blood immediately
2. Rub and massage their arms and legs vigorously to stimulate circulation
3. Place the victim in a hot bath (45°C) immediately upon boarding
4. Handle the patient gently, remove wet clothing, insulate the core with dry blankets/tarps, and avoid giving alcohol or massaging limbs (preventing lethal 'afterdrop' cardiac arrest)