Agreeing with the first response: it should focus on YOUR achievements. As an advisor, I appreciate sharing in other peoples' successes, but of the three proposed topics, #3 better addresses the prompt, though you may want to focus on the work you did to make the team in the first place.
For some people, it's graduating high school, especially first in the family... or perhaps you were on the verge of failing. Use that as a standard. Think of accomplishments that defined you or your character/personality/confidence.