Based on the previous rounds, I notice some patterns forming. The opponent chose paper in the last round to counter my rock. They might expect me to switch to paper now to counter their anticipated rock, in which case they would likely choose scissors. By choosing rock again, I can break this prediction cycle and potentially win against scissors. Additionally, if they're following their own pattern (scissors, rock, scissors, paper), they might choose rock next, resulting in a tie. This move balances reasonable odds while being somewhat unpredictable.