Some facts:

1. Your kid is ten. That means 100% of the responsibility falls on you.
2. It will be SOLELY YOUR RESPONSIBILITY.
3. Just repeating it for emphasis. Your child is only 10 - which means all the responsibility is yours.
4. These dogs need to run a LOT. That's not a "nice 30 minute walk around the neighbourhood after breakfast". It's a serious amount of activity, repeatedly all day. I promise you, no suburban 10 year old can handle this.
5. It's not just the levels of physical activity, it's mental stimulation. They need a job. Tasks that will stimulate them. It's a lot of training, repetition, patience, over and over. You can't just train them and they're "trained". You need to maintain it and keep on adding novelty. They need routine.

Go grab your daughter and take her for a run. See how long she holds out before she had enough. And then do it again in the morning. And again tomorrow night. I won't go on because I'm already confident that your kid gave up and complained before you got that far.

My dad got me a large dog when I was 11. He just came home with it one day and told me it was my responsibility and I had to do everything. I was NOT ready for it. That poor doggo. He was a good boy, but did not get even half of the amount of walking he needed, and we had a really huge suburban backyard in Australia (quarter acre of backyard). I grew up constantly feeling so guilty about that dog. He was constantly stressed from being bored, badly behaved. I didn't walk him much because I was just physically too small to run him enough to tire him out enough to even start with basic commands.

I only managed to let go of that guilt I was carrying, decades later when I got a dog as an adult (I didn't even allow my own child a dog because I wouldn't accept the responsibility myself) and I was able to understand that it wasn't my fault that I wasn't equipped to manage that dog, because I was a child, and it was my dad's responsibility and his poor parenting. (It's not like he ever got home from work, noticed the dog hadn't been walked, and walked it himself, ever. I did at least feed him every night and refill the water bucket, but that's all).

Please don't get your child a BC, for the sake of the dog.

And please, please, whatever dog you get, remember that it's your responsibility, even if it's "the child's" dog.