The Mother of a School-Aged Patient Says,"My Daughter Appears Much

The mother of a school-aged patient says,"My daughter appears much thinner than she did a few years ago.Should I be worried?" Which response by the nurse is most appropriate?

A) "Does your child vomit after meals?"
B) "How many meals does your child eat each day?"
C) "It is important that we monitor your concern closely with frequent visits."
D) "Body fat diminishes and distribution changes during this stage of development."