3 kilometers.
Since the text is cut off, I'm going to assume that one lap is 500 meters.
With this knowledge, we know that we have to multiply the number of laps with the length to get the result of 3,000 meters. However, since that is not an answer choice, you must convert it into kilometers. One kilometer is 1,000 meters, making the answer to be 3 kilometers.
Hope this helps!