A Patient Has a 10-Year History of Diabetes Mellitus

A patient has a 10-year history of diabetes mellitus.The patient is admitted to the critical care unit with complaints of increased lethargy.Serum laboratory values validate the diagnosis of diabetic ketoacidosis.Which of the following statements best describes the rationale for administrating potassium supplements with the patient's insulin therapy?

A) Potassium replaces losses incurred with diuresis.
B) The patient has been in a long-term malnourished state.
C) IV potassium renders the infused solution isotonic.
D) Insulin drives the potassium back into the cells.