Looking at the pattern, my opponent has used scissors once and paper twice, but never rock. Since they've used paper in the last two rounds (resulting in ties), there's a good chance they might stick with paper again. By choosing rock, I would lose if they switch to scissors, but I would win if they continue with paper. Given their tendency to repeat moves (paper twice) and their need to catch up in score, this seems like a strategic choice to potentially extend my lead.