What roles do calcium and vitamin D play in bone health and where can these nutrients be sourced?

• A. Calcium supports bone density; vitamin D has no role; sources include citrus fruit.
• B. Calcium builds bone; vitamin D aids calcium absorption; sources include dairy, fortified foods, leafy greens (calcium) and sunlight/fatty fish (vitamin D).
• C. Calcium builds bone; vitamin D aids calcium absorption; sources include dairy, fortified foods, leafy greens for calcium; sunlight and fatty fish for vitamin D.
• D. Calcium builds bone; vitamin D reduces bone density; sources include red meat.

Answer: (C)