Final answer:
The correct statement by the child that indicates an understanding of the teaching is option c) "I will eat a snack of 5 grams of carbohydrates if my blood glucose is low."
Step-by-step explanation:
To indicate an understanding of the teaching, the correct statement by the child would be option c) "I will eat a snack of 5 grams of carbohydrates if my blood glucose is low." This statement demonstrates knowledge of the need to consume a specific amount of carbohydrates to raise blood glucose levels when they are low. The other statements are incorrect. Blood glucose testing requires puncturing the side of the finger, not the pad (option a). Regular insulin should typically be injected 15-30 minutes before a meal, not specifically before breakfast (option b). It is important to increase fluids when sick, not decrease them (option d).