Which statement about childhood lead exposure is most accurate?

Which statement about childhood lead exposure is most accurate?

• A. Houses built after 1978 are most likely to have lead-based paint
• B. Children absorb a higher percentage of lead than adults
• C. Most pediatric lead poisoning occurs via normal hand-to-mouth behavior in the presence of environmental lead dust
• D. Children in minority ethnic groups have a lower incidence of lead poisoning than Caucasian children

Answer: (C)

The key idea is how children commonly become poisoned with lead: they ingest tiny amounts of lead that are present as dust in the environment, often picked up from surfaces, toys, or floors, through normal hand-to-mouth activity. Kids explore with their mouths, and lead-containing dust can settle in the home, especially in older houses that once used lead-based paint. Even small amounts of this dust can be ingested repeatedly during daily play, making this the most typical and effective description of how pediatric lead poisoning occurs in real life. Households built after 1978 are less likely to contain lead-based paint, since lead paint was banned then; thus this statement is not accurate. It’s true that children absorb lead more readily than adults, but that detail describes pharmacokinetics rather than the common exposure route, so it doesn’t capture the most accurate description of how exposure happens. Regarding ethnicity, lead poisoning is more, not less, common among some minority groups due to factors like older housing and socioeconomic disparities, so this statement is also incorrect.

The key idea is how children commonly become poisoned with lead: they ingest tiny amounts of lead that are present as dust in the environment, often picked up from surfaces, toys, or floors, through normal hand-to-mouth activity. Kids explore with their mouths, and lead-containing dust can settle in the home, especially in older houses that once used lead-based paint. Even small amounts of this dust can be ingested repeatedly during daily play, making this the most typical and effective description of how pediatric lead poisoning occurs in real life.

Households built after 1978 are less likely to contain lead-based paint, since lead paint was banned then; thus this statement is not accurate. It’s true that children absorb lead more readily than adults, but that detail describes pharmacokinetics rather than the common exposure route, so it doesn’t capture the most accurate description of how exposure happens. Regarding ethnicity, lead poisoning is more, not less, common among some minority groups due to factors like older housing and socioeconomic disparities, so this statement is also incorrect.