I'd love to be a baby again and know what I know now. Uh; until it's time to breast feed. That's just disturbing.
3 because I'd invent shit that was invented later in my lifetime and make all the money and grow as much weed as I want.
If I picked number three I would write the Harry Potter books. JK Rowling is rich so that is a gold mine.
Option A, for sure. I could live comfortably for the rest of my life, provided I do some saving first.