Nancy and Hiyang are training for a race. They entered some of their training notes in a chart. A 3-column table with 5 rows. The first column labeled day has entries Monday, Tuesday, Wednesday, Thursday, Friday. The second column labeled Nancy's distance run has entries 2, 3, 3, 4, 5. The third column labeled Hiyang's distance run has entries 5, 5, 7, 8, 10.
Which information should be added to the chart in order find out who ran a greater distance?

the time spent running each day
the reference point used each day
the units used to measure distance each day
the location used by the runners each day