The opponent has chosen rock twice (rounds 1 and 3) and scissors once. There appears to be a slight preference for rock. Additionally, after I chose rock in the previous round resulting in a tie, the opponent might anticipate me switching to paper and therefore choose scissors to counter. However, considering their historical preference for rock and the fact that they might stick with what has worked well for them (avoiding losses), I believe paper is the strongest play. If they choose rock again, I win; if they predict my paper and choose scissors, I lose; if they choose paper, we tie.