The mother of a child diagnosed with type 1 diabetes calls to discuss the child's self-monitoring blood glucose (SMBG) home readings. The child is being tightly regulated with a combination of NPH and regular insulin before breakfast and supper. The past two mornings, the blood sugar readings were 220 mg/dL and 210 mg/dL. The nurse should advise the mother to take which of the following actions?
1. Continue the child's medication regime.
2. Check the blood sugar during the night.
3. Give the NPH insulin later in the evening.
4. Serve the bedtime snack earlier in the evening.