The answer is C. You don't really need the others because they don't impact your physical health. If you think about it that way!!
It provides structure to the body. With our our strong healthy bones to support us, we would just be walking skin bags with organs and hair. The bones give us the legitimate support for everything, the muscles attach to the bones, so while it may feel like your muscles are doing all of the work, they aren’t. Your bones play a huge roll, in you everyday moving. What makes bones stronger? MILK!
