A nurse is assessing a child who has an acute kidney injury. Which of the following clinical manifestations should the nurse expect?

A. Decreased respiratory rate: Respiratory rate may increase due to fluid overload and acidosis, but decreased rate is not typical. B. Polyuria: In the initial phase of AKI, oliguria (low urine output) is common, not polyuria. C. Hyperactivity: Hyperactivity is unrelated to AKI; lethargy and confusion are more likely. D. Edema: Edema occurs due to fluid retention from decreased urine output in acute kidney injury (AKI).