Final answer:
The correct action for the nurse is to give two thirds of the daily dose before breakfast and one third before the evening meal.
Step-by-step explanation:
The correct action for the nurse to take when the client with type 1 diabetes is ordered both NPH and Regular insulin is to give two thirds of the daily dose before breakfast and one third before the evening meal. This allows for appropriate coverage of insulin throughout the day to match the body's natural insulin release and glucose levels. Splitting the doses in this way helps to prevent hypoglycemia during the evening hours.