The nurse is teaching a child with type I diabetes mellitus to administer insulin. The child is receiving a combination of short acting and long acting insulin. The nurse knows that the child has appropriately learned the technique when the child:

A. When mixing insulins, the short-acting insulin should be drawn into the syringe first to avoid contamination of the short-acting insulin with the long-acting insulin. B. Insulin should be administered subcutaneously, not intramuscularly, and the sites should be rotated to avoid lipodystrophy. C. Insulin should be administered at a 90-degree angle, not 30 degrees, to ensure proper subcutaneous delivery. D. Wiping the needle with an alcohol swab is unnecessary and could introduce contaminants.