Well the only solution to this. Is there any communicating of this possible choice to your daughter? Why not see if she understands the issue, not pulling her one way. Give her the option. See what she says. Maybe that will be the deciding factor?
Or another option is get the teacher to decide. I know not enough is given to the parents for decisions and they might have already told you it is your call. Why not leave the final decision to the teacher?
Just a couple of options that I thought of for you both to think about.
Joe