>>143993871) from nothing (which makes no sense, if something can come from nothing, why dont we see it all the time? there must be a variable)
2) from god (which also makes no sense, if god existed eternally, why not existence itself?)
3) eternal fluctuation (possible but still many questions)
I'd bet 3 because we might not know the ends of 3, but atleast its a plausible scenario. Other scenarios are nonstarters.