I think it just depends what you're used to. For me, #1 would make me think I missed a double quote somewhere and would waste time rereading. It would really annoy me as a reader.
And #2 would make me think someone else started talking, so I would again have to go back and reread, or worse, continue reading and never realize it's the same person talking.
I'm used to #3, so it's pretty natural for me.
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