During a clinic visit, a mother tells the practical nurse (PN) that she keeps her 2-year-old child in a playpen so he will not get dirty. Which rationale should the PN use in responding to this parent?

Playpens provide a sense of security for the child.

Children need time to actively explore their environment.

Playpens provide a safe environment for a toddler.

Over-concern about appearance can be harmful.