A school-aged child is admitted to the hospital with newly diagnosed, insulin-dependent diabetes mellitus. On admission his blood sugar is 180 mg/dL. His urine tests negative for ketones. He receives 10 units of regular humulin insulin subcutaneously half hour after admission. What should the nurse do next（）
A. Carefully regulate an intravenous solution of normal saline and insulin at 2. 5 hours after admission.
B. Encourage the child to drink at least 500 mL of a sugar-free clear liquid 1.5 hours after admission.
C. Begin intravenous administration of 5% dextrose in water 1 hour after admission.
D. Assess the child 2. 5 hours after admission for shakiness, feelings of anxiety, or decreased level of consciousness.
