The practical nurse (PN) is reinforcing client teaching from a nutritional class. Which stage of life is most crucial for females to increase calcium intake to help prevent osteoporosis?

A. Late Middle adulthood: Calcium intake is important at all ages, but prevention is most effective before peak bone mass is reached. B. Late adulthood: At this stage, bone loss prevention is still important, but most peak bone mass has already been lost. C. Middle adulthood: Bone mass maintenance continues, but the critical period for maximizing peak bone mass is earlier. D. Early adulthood: Bone mass peaks by the late 20s; maximizing calcium intake during early adulthood helps prevent osteoporosis later.