A patient with diabetic ketoacidosis has glucose 620 mg/dL, pH 7.10, bicarbonate 9 mEq/L, anion gap 24. After 1 L isotonic crystalloid, potassium is 3.1 mEq/L. What is the next step before initiating insulin infusion?AStart insulin infusion at 0.14 units/kg/hour immediatelyBGive 50 mEq sodium bicarbonate IVCAdminister IV potassium to raise serum potassium above 3.3 mEq/L, then start insulinDBegin subcutaneous insulin glargine 0.3 units/kgEStart dextrose infusion now to prevent hypoglycemiaCheck my answer