A nurse is providing teaching about self-administration of insulin to the parent of a school-age child who has a new diagnosis of diabetes mellitus. Which of the following statements by the parent indicates a need for further teaching?

A. "The insulin can be injected anywhere there is adipose tissue.": Insulin should be injected into fatty tissue (subcutaneous tissue) to allow for proper absorption. Common injection sites include the abdomen, thighs, and upper arms. B. "The insulin should be injected at a 90-degree angle.": This is correct for most injections, especially in children or individuals with more subcutaneous fat. Injecting at a 90-degree angle ensures that the insulin is delivered into the subcutaneous tissue rather than muscle. C. "I will be sure my child aspirates before injecting the insulin.": Aspiration is not necessary when administering insulin. Since insulin is injected subcutaneously and not into a vein, aspiration is not required. D. "I will be sure my child rotates sites after 5 injections in one area.": Rotating injection sites helps prevent tissue damage, lipodystrophy (fatty lumps or dents), and improves insulin absorption. It's recommended to rotate the injection sites to avoid using the same area repeatedly.