In frostbite and hypothermia, the affected parts are immobilized, the victim is given a hot drink and taken to a warm area. Rubbing with snow damages the skin, a warming compress or a heating pad can burn it, and alcohol only gives a feeling of warmth, while the body loses heat faster.
In frostbite and hypothermia, the aim is gradual and safe warming from the inside out. You must take the victim to a warm place, wrap them in a blanket, immobilize the affected parts to prevent tissue damage, and give warm, non-alcoholic drinks.
Option 1. Rubbing with snow physically damages frozen tissue, and alcohol actually lowers the body temperature.
Option 3. Heating pads can easily burn numb skin, and using ointments is dangerous for frostbitten tissue.