I vote for (1) and (2), although I don't think that even modern physicists agree on the answer to this! I'm curious as to what others have to say on the matter!
It seems to me that Epicurus would have noted that you don't see any naturally occurring exact duplications and factored that into his thinking. He would have been aware of identical twins, however, so that begs the question as to the depth of his knowledge of them. Even then, I think that he would have considered identical twins as a class, meaning that there would be infinite examples of identical twins and not of a specific twin or set of twins.
For an entertaining and sometimes amusing look at (3) in particular, and possibly (4), I recommend watching the last few Spider-Man films, both live action and animated. Also, Marvel's Doctor Strange movies. In fact, Marvel has been exploring the "multiverse" idea in several of their franchises.
Then there's Nietzche's eternal recurrence. I'm not too familiar with it, but it seems to me that this was just a thought experiment and not a serious proposal of the way things are. But I could be wrong on that.