I voted for option two, but I would like to say with a proviso in that a consciousness can be 'transferred' at the quantum scale via entanglement to any substrate necessary. Basically, what you got here is the ship of Theseus argument of Aristotle here. The ship of Theseus is a naval vessel, now imagine something breaks on the ship like a board on the deck. A deck hand goes and replaces the board, now imagine over the years that the ship is in service. The more boards on the deck break, even the mast breaks, each gets replaced over time. Ask this question: is it the same ship? According to Aristotle it is at one level, but at another level it is not, but I forget how he divides among his categories of causes, sorry.
When you use this argument you can argue that consciousness can be transferred if and only if the effective nature of the consciousness remains intact. Meaning while a person is dying as their consciousness is being moved to a new substrate, that person actually feels connected to the new substrate or body, thus proving that their awareness if following where you put it, but if this does not occur, all you have done was clone the person, which is not bad per se, but it's not real immortality.
-- Bridget