Based on the previous rounds, my opponent started with rock and then switched to scissors after losing. After our tie in round 2, they might play paper in this round for two reasons: 1) They haven't played paper yet and might want to complete the set of moves, and 2) They might anticipate that I'll play rock to counter their previous scissors. Additionally, after experiencing a loss followed by a tie, they may be more aggressive with their strategy to secure a win. If they do play paper as I predict, scissors would be my optimal choice.