A) Nothing, just totally naked
B) What you’re wearing and anything you carry with you (even if you’re not carrying it right now) like a bag
C) What you’re wearing, what you carry with you, and the contents of your home (it will be teleported within a few hundred metres on the surface in an accessible location, but obviously won’t be connected to any services like electricity or water)
At least with C I have a bunch of hand tools, camping gear, rope, life straws, water filters, medical kits, and alcohol. So I could feasibly live life as a hermit in a self built cabin.
A & B I’m totally fucked. I’ve watched all of Alone, I think I starve to death in weeks.
In all those situations I don’t speak any of their languages to defend or explain myself, so I’m fairly sure the locals will murder me.