Looking at our game history, I see we're tied at 1-1 with two ties. The opponent chose paper last round to counter my rock, suggesting they might be adapting to my previous moves. They may expect me to switch to scissors after losing with rock, in which case they might play rock to counter. Alternatively, if they expect me to stick with rock, they might play paper again. Paper gives me good coverage against a potential rock play while risking a loss only if they anticipate this exact reasoning and choose scissors. Given that rock has appeared most frequently in our game so far, paper seems to be the strategic choice.