A nurse is providing teaching to a school-age client who has a new diagnosis of type 1 diabetes mellitus. Which statement by the client indicates an understanding of the teaching?

A. Insulin doses should not be reduced when sick, as illness often increases blood glucose levels. B. Eating a snack before physical activity helps prevent hypoglycemia, demonstrating a good understanding of how to manage blood glucose levels during exercise. C. Counting carbohydrates, not fat calories, is essential for managing blood glucose levels in diabetes. D. Blood glucose levels are typically checked before meals and at other key times, rather than only after meals.