A 7-year-old boy is brought to the physician by his mother for a 2-day history of vomiting and sluggishness. He has been drinking a lot and using the bathroom frequently for the past couple of weeks. His glucose is 458 mg/dL. Which of the following is most likely to be seen in this patient?
A) Decreased β-hydroxybutyrate
B) Decreased serum sodium
C) Decreased urinary potassium
D) Increased glucokinase activity
E) Increased total body potassium
