A nurse is reinforcing teaching with the parents of a 4-month-old infant during a home visit. Which of the following findings in the infant's room indicates a need for further teaching? a. The infant's crib has a firm mattress and is free of toys and loose bedding. b. The infant's room is kept at a comfortable temperature with proper ventilation. c. The infant's pacifier is attached to a clip that is safely attached to the crib. d. The infant's diaper changing supplies are stored within reach but out of the infant's sight and reach.