C I think because if it’s not functioning correctly that’s bad for kids health so I would say c but I’m not positive
it can be cause by or effect the other body systems so it is better for then to ask questions so they can find the right source of pain
Explanation:
I hope I helped <3
You should go over there and help them.If they are hurt.you should get your first-aid kit and see if there anything you go get them to help.If you don't have a first aid kit,the best think would to call 911.