Looking at the pattern so far, the opponent seems to have adapted to counter my moves in rounds 4 and 5. Since the opponent chose rock in round 5, there's a possibility they might stick with rock again or switch to scissors anticipating my move. By choosing paper, I have a chance to counter if they choose rock again. Additionally, since we're entering the second half of the game and I need to catch up, taking a calculated risk with paper seems reasonable.