Answer:
A. could happen in the future.
Look back at a time where you really screwed things up, but you learned something
then basically just tell them a time where you screwed up and survived
(you could just take the time that you messed up and make up a lesson you learned, you don't actually have to learn it, it just has to sound believable)
You can talk about how you can help the band improve and what impact you can make.