The Nurse in a Pediatric Clinic Identifies an Infant with Rickets

The nurse in a pediatric clinic identifies an infant with rickets. The mother, who is from a Middle Eastern culture, has been exclusively breastfeeding the infant since birth. Which most probable cause does the nurse recognize?

A) Incidence of rickets in breastfed infants is high.
B) The infant lacks sufficient calcium and vitamin D.
C) Cultural practices contribute to the diagnosis.
D) The mother has a history of being lactose intolerant.