Answer:
C. kilometer
Step-by-step explanation:
It is best to measure a marathon in terms of a kilometer. A marathon is approximately 26.2 miles long. You can convert miles to kilometers by multiplying a value in miles by 1.60934:
[tex]26.2\ \times \ 1.60934 \\\approx 41.84 \textsf{km}[/tex]
Therefore, C. kilometer is the final answer!