What is the strongest continuation for Black?

Casual Game, https://itsyourturn.com
Sky_Fly vs. John Coffey

1 2 3 4 5 6 7 8 h g f e d c b a +4

(black to move) 1. e4 e6 2. Bc4 d5 3. exd5 exd5 4. Bb3 Nf6 5. h3 c5 6. a3 Bd6 7. Qf3 Nc6 8. Bxd5 Nd4 9. Qe3+ Kd7 10. Qg5 Nxc2+ 11. Kd1 Nxa1 12. Bxf7 Qe7 13. Bc4 Ne4 14. Qxe7+ Kxe7 15. Ke2 Nc2 16. Nf3 Re8 17. Bd3 Kf8 18. Bxe4 Rxe4+ 19. Kd3 Bf5 20. Kxc2 Re1+

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Pawn promotion:
	- Queen
	- Rook
	- Bishop
	- Knight