During the diuresis period of acute kidney injury (AKI), the nurse should observe the client closely for which complication?

A. Renal calculi are not a typical complication during the diuretic phase of AKI. B. Hypokalemia can occur but is not as immediately critical as dehydration during this phase. C. Dehydration is a key risk during the diuretic phase because the kidneys begin excreting large amounts of urine before full recovery of kidney function, leading to significant fluid loss. D. Oliguria occurs in the earlier (oliguric) phase, not the diuretic phase.