U Michigan Ann Harbor supplemental questions help?

If you could only do one of the activities you have listed in the Activities section of your Common Application, which one would you keep doing? Why? (Required for all applicants. Approximately 100 words)

I’m confused with the wording of this question. Is it asking what one activity I would’ve done in my entire high school career? or is it asking what one activity I would continue on even after high school?

*Ann Arbor

They want to know, out of all the activities, which one activity you would continue to do after high school.