A 52 year old patient is admitted to the hospital with vomiting/diarrhea and has fasting blood sugar of 512 mg/dl and an arterial pH of 7.38. He is diagnosed with diabetes mellitus and treated with insulin and IV fluids. The nurse recognizes that most likely this patient a:will require insulin treatment only during stress, b:is demonstrating the abrupt onset of type 1 diabetes, c:will require long term insulin therapy to control diabetes, or d:has enough endogenous insulin to prevent diabetic ketoacidosis with the hyperglycemia?