My opponent has shown a tendency to play scissors in recent rounds (rounds 3 and 6). Additionally, they've played rock most frequently (3 times), and I've won with rock in the previous round. While they might anticipate me playing rock again and counter with paper, the historical data suggests they favor rock and scissors. Playing rock gives me a win against scissors and a tie against rock, making it the highest probability play based on the opponent's demonstrated patterns so far.