A nurse is assessing a 3-year-old toddler diagnosed with bronchitis. Which clinical finding should prompt the nurse to anticipate a prescription for a chest x- ray?

The toddler is coughing intermittently without respiratory distress.

The toddler has a persistent high fever and audible crackles lung auscultation.

The toddler has a normal oxygen saturation and clear lung sounds.

The toddler has mild nasal congestion and occasional wheezing.