Looking at the opponent's pattern, they've chosen scissors twice (rounds 1 and 3) and paper once. There seems to be a preference for scissors, so rock would be a good counter. Additionally, my opponent might expect me to continue a pattern since I've played paper-rock-scissors in sequence, potentially anticipating paper from me next - another reason to choose rock instead. Since I'm behind 0-2, I need to make a strategic choice rather than a purely random one.