Which Statement Best Distinguishes Between the Criterion of Adequency Used

Which statement best distinguishes between the criterion of adequency used to set the EAR for phosphorus in adults and in children?

A) For adults the criterion is the amount required to maintain blood phosphorus levels,while for children the amount needed for bone and tissue growth is also included.
B) For children the criterion is the amount required to maintain blood phosphorus levels,while for adults the amount needed for bone and tissue growth is also included.
C) For adults the criterion is the amount required to minimize urinary excretion,while for children the amount needed for bone and tissue growth is also included.
D) For adults the criterion is the amount required to maintain bone health,while for children the amount needed for bone and tissue growth is also included.