Now that I think about it, it would be A and B because you need your bones for support and they also protect your organs. As for D it's the other way around your muscles help your bones move.
Heridity is something you get from your parents and they got from theirs etc their like genes and to take care of heredity like eye sight problems you wear glasses or for sensitive skin you purchase sensitive skin products like shampoo etc
I am pretty sure it is D
I hope this helps you !!
<span>USA: Osteoporosis and low bone mass are currently estimated to be a major public health threat for almost 44 million U.S. women and men aged 50 and older. I hope this is correct.</span>
