Three children in a family, ages 7 months, 4 years, and 9 years, have been tested for lead poisoning. The two younger children’s tests reflect elevated lead levels, and they will be undergoing treatment. The children’s mother questions why her younger children’s tests were elevated but her older child’s was not. What response by the nurse is most correct?

Your older child has a stronger liver and kidneys, which have helped her to better rid her body of the lead

Some children are better able to metabolize toxins such as lead after exposure

It is likely your older child may have had elevated levels earlier in life but has gotten over the condition

Younger children are often impacted because their play behaviors place them on the floor and they often put things into their mouths