A Four-Year-Old Child Who Has Lead Poisoning Is Admitted for Chelation

A four-year-old child who has lead poisoning is admitted for chelation therapy. The child's father asks the nurse how the child got lead poisoning. The nurse bases the teaching on the knowledge that this problem is:

A) Related to the child's ingestion of non-food substances
B) Attributed to an indigent and passive parent who fails to supervise the child
C) Considered to be environmental, with lead available for oral exploration by an unsupervised child
D) Associated with high-risk groups, including those with pica and those exposed to hazards present in the environment