The health insurance company acts as a middle man for the purchase of these medical services. The process is you enroll in a health insurance and pay them on a monthly basis to save for future emergencies. Then, the health insurance company will be the one to communicate with the hospitals for health services.
I should say that's a little bit impossible, you have no money to do it, your parents will need to do it for you, so, it's not like "ok" but sometimes it happens and will need to be this way.
All of them are important rules but i would say D because chocolate is fattening and has lots of sugars and eating snack foods is not healthy either.