This is the final and decisive round. Looking at my opponent's previous choices, they've selected paper most frequently (4 out of 9 rounds). While there's no guarantee they'll choose paper again, it's their most common choice historically. Additionally, they haven't shown a strong tendency to counter my previous moves. By choosing scissors, I have a good chance of winning if they continue their paper preference. Even if they go with rock (which they've only chosen twice), the worst case is I lose, but the best case is I win the entire game.