The nurse is teaching a class on preventing osteoporosis to a group of perimenopausal women. Which of these actions is the best way to prevent or delay bone loss in this group?

A. While medications may help prevent osteoporosis, lifestyle changes such as weight-bearing exercise are more effective and beneficial in the long term, especially for bone health. B. Weight-bearing exercises, including walking, help stimulate bone formation and maintain bone density, which is crucial in preventing osteoporosis in perimenopausal women. C. While monitoring bone density is essential for detecting osteoporosis, the best preventative strategy is improving bone health through weight-bearing activities, adequate calcium intake, and other lifestyle changes. D. Vitamin B12 plays a role in maintaining nerve function and red blood cell production, but it is not directly involved in preventing osteoporosis.