It’s been a while since I did this but B sounds the most accurate.
Scientist study index fossils so they will get an understanding of what life was like back then.
I think you just answered your question. They encourage adolescents to eat calcium-rich foods because it aids in bone formation, like you said.
Nature is genes. Nurture is how someone or something is grown/ raised. Scientists believe both are important, so they do not choose one over the other.
I hope this helps.
