We don't, of course, ever have nationwide referenda on anything, so your hypothetical is just plain fantasy.
Wow Mark I had no idea we didn't actually have national referendums. Thank you for this valuable contribution to advance the discussion. Next time I'll think twice before posting a hypothetical scenario on a politics/elections forum.
Glad I could help. Every time you post a question about a hypothetical scenario that is impossible to occur, I'll try to be there pointing it out for you.
BTW, my vote in the poll is option 3.