Has Maksim Chmerkovskiy been a competing pro on Dancing With The Stars for 15 seasons?
Yes
No, he has been a competing pro for 17 seasons
No, he has been a competing pro for 16 seasons
No, he has been a competing pro for 14 seasons
Answer
Maksim Chmerkovskiy has been a competing pro on Dancing With The Stars for 17 seasons, not 15. He first appeared on the show in season 2, and has been a part of it ever since.
Dancing into Stardom: Maksim Chmerkovskiy's Journey