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(please explain why?)
Which statement best explains the relationship between diet and osteoporosis?

A. Cholesterol blocks calcium from reaching bone cells. A diet that is high in cholesterol can lead to osteoporosis.
B. Calcium and phosphorus build strong and flexible bones. A diet that lacks these nutrients can lead to osteoporosis.
C. Protein and iron build strong and flexible bones. A diet that lacks these nutrients can lead to osteoporosis.