Encouraging Outdoor Play Will Help the Child Reduce the Risk

Encouraging outdoor play will help the child reduce the risk of osteomalacia because:

A) Exposure of the skin to ultraviolet light will enhance activation of parathyroid hormone.
B) Exercise will help increase osteoblastic activity to maintain calcium in the bone.
C) Ultraviolet light from the sun increases the level of an inactive form of vitamin D.
D) Play increases renal perfusion, which helps to activate vitamin D.