Looking at the game history, there are several observations: 1) The opponent has chosen scissors most frequently (4 times), 2) The opponent just used rock in round 9 and might be less likely to repeat it, and 3) Given that scissors appears to be their preferred choice, selecting rock gives me the best chance to counter. While I cannot win the overall game since I'm down 1-3 with only one round left, choosing rock maximizes my chances of at least getting a second win and making the final score closer.