A nurse is caring for a 10-month-old infant who is in a cast for developmental dysplasia of the hip. Which of the following strategies should the nurse implement to promote the infant's growth and development?

Choice A reason: Allowing an infant with a hip cast to stand risks disrupting the correction of developmental dysplasia, as weight-bearing can misalign the hip joint. The cast maintains proper positioning, and standing could cause joint instability, delaying healing and proper femoral head development. Choice B reason: Latex balloons pose a choking hazard and risk allergic reactions in infants. They do not promote developmental dysplasia recovery or growth, as they provide no therapeutic stimulation. Visual stimuli are beneficial, but safe, age-appropriate toys are needed to support development. Choice C reason: A small electronic toy stimulates cognitive and sensory development in a 10-month-old with a hip cast. It encourages fine motor skills and engagement, supporting developmental milestones like object exploration and cause-effect learning, which are critical despite mobility restrictions from the cast. Choice D reason: Prompt diaper changes prevent skin breakdown, important in a casted infant, but do not directly promote growth and development. While hygiene prevents infections, it addresses physical care, not cognitive or motor milestones critical for developmental progress in this age group.