Which of the Following Statements Best Describes Osteoporosis

Which of the following statements best describes osteoporosis?

A) Men are more at risk for it than women.
B) Estrogen helps protect calcium in women's bones prior to menopause
C) It is uncommon in Canada because calcium deficiency is rare in North America.
D) It is associated with increased height because the bones are loosened, resulting in lengthened spines.