From the day we first met we were at odds. If she said, "go," I said, "stop." If she said, "yes," I responded, "no." She was always my rival and enemy. It was time for the student council election that would determine who would be in charge. Would it be me or my nemesis?
Choose the best meaning for the word "nemesis” as it is used in the passage.
student
sister
opponent
magician