The nurse is teaching a client with early osteoporosis the importance of including vitamin D with calcium supplements. Which information is most important for the nurse to provide to encourage the client's compliance in the management of progressing osteoporosis?

A. Vitamin D combined with calcium is balanced with phosphorus for absorption for strong bones: While phosphorus is important for bone health, this statement does not specifically address the role of vitamin D in calcium absorption. B. Calcium uses vitamin D that is produced in the skin by exposure to sunshine: This statement describes the role of sunlight in vitamin D synthesis but does not emphasize the importance of vitamin D supplementation in osteoporosis management. C. Avoiding the use of sunscreen is important for adequate vitamin D synthesis: While sunscreen can inhibit vitamin D synthesis, this statement does not directly address the importance of vitamin D supplementation in osteoporosis management. D. Adding daily Vitamin D with oral calcium supplements promotes absorption of calcium into bone: This statement emphasizes the crucial role of vitamin D in facilitating calcium absorption into bones, which is essential for maintaining bone density and preventing osteoporosis progression.