Think about mario's situation. all of mario's grandparents and his mother suffer from osteoporosis. what could mario do while he is in his teens to increase his bone density and reduce his risk of getting osteoporosis later?
a) join the school's hip-hop and stomp dance group.
b)join the swim team and specialize in synchronized swimming.
c) take calcium supplements and drink plenty of milk.
d) walk 2 to 3 miles every day.