The opponent has shown a strong preference for choosing rock (4 out of 7 rounds), especially in the last two rounds. Given this pattern, paper would be the optimal choice to continue capitalizing on this tendency. While there's a risk the opponent might switch to scissors to counter the paper that won the last two rounds, the historical data shows they haven't used scissors at all yet, making this less likely. The opponent might also expect me to change my move after consecutive wins, so sticking with paper could be unexpected.