An adult with DKA arrives: glucose 410 mg/dL, pH 7.12, bicarbonate 10 mEq/L, anion gap 25, K⁺ 4.5 mEq/L. After 1-1.5 L isotonic saline in the first hour, what is the next best step?AStart subcutaneous rapid-acting insulin 0.1 units/kg onceBStart IV insulin only after glucose <250 mg/dLCGive IV sodium bicarbonate routinely until pH ≥7.3DBegin continuous IV regular insulin at 0.1 units/kg/h with frequent K⁺ checksEHold insulin until ketones clearCheck my answer