Final answer:
The length of the circular track is 2 km, as it corresponds to the track's circumference, and negative values for length are not physically meaningful.
Step-by-step explanation:
The race car completes the final lap of a race on a -2 km circular track at a speed of 60 m/s. To determine the length of the circular track, we only need to focus on the information of the track being circular and its measurement. In this case, the negative sign before the 2 km might be a typographical error because the length of a track cannot be negative. Since no other context is provided, we can assume that the total length of the track is 2 km, which corresponds to the circuit's circumference.
Option 1) 2 km is the correct answer.