A patient with type 1 diabetes mellitus is preparing for a moderate 30-minute exercise period. Which action best indicates understanding of condition management?

A. The patient eats a high-carbohydrate snack before the exercise period: It is important for a patient with type 1 diabetes to ensure they have adequate glucose levels for exercise. Eating a high-carbohydrate snack before exercise is not always necessary unless blood glucose is low. B. The patient reduces insulin use during days when exercise periods are planned: Insulin needs may be adjusted in relation to exercise, but reducing insulin across the board is not recommended without professional guidance. C. The patient should know blood sugar before activity: It is important for patients with type 1 diabetes to check their blood sugar before exercise to ensure it is in a safe range. If the blood sugar is too low, they should consume a carbohydrate to prevent hypoglycemia. D. The patient administers insulin after exercise rather than before exercise: Insulin should be timed appropriately to cover food intake and prevent post-meal hyperglycemia. Delaying insulin until after exercise could lead to high blood sugar levels.