Looking at the pattern so far, my opponent has played rock, paper, rock in the first three rounds. There's a possibility they might be cycling back to paper for this round. Also, they've shown a preference for rock (playing it twice), which paper would beat. Since I'm currently behind in the score, I need to make a strategic choice that has a good chance of winning this round. Paper seems to be the optimal choice based on the opponent's previous moves and potential patterns.