When Interviewing the Mother of a 3-Year-Old Child,the Nurse Asks

When interviewing the mother of a 3-year-old child,the nurse asks about developmental milestones.This should be considered

A) unnecessary information, because the child is 3 years old.
B) an important part of the family history.
C) an important part of the child's past growth and development.
D) an important part of the child's review of systems.