The opponent has shown a tendency to mirror my moves in many rounds. Their pattern shows slightly more rock choices than the others. Given that the opponent chose paper in round 9, there's a chance they might choose paper again or switch to scissors expecting me to choose paper. If they choose paper, scissors will win. If they mirror my scissors choice, it will be another tie. Since the opponent has used scissors least frequently (only 2 times), this seems like the best strategic move for the final round to maximize my win chance.