Looking at the opponent's choices, they seem to be following a pattern: rock → scissors → paper → scissors → paper. If this pattern continues, they would play scissors next. Additionally, the opponent has only chosen rock once in 5 rounds, preferring paper and scissors. Since I'm leading 4-1, I can make a calculated choice here. Rock would be the best option to counter their likely scissors play. Even if they anticipate my strategy and switch to paper, I'm in a strong position overall to absorb one loss.