A nurse is providing teaching to an adolescent who has type 1 diabetes mellitus. Which of the following should the nurse include in the teaching?

A. Glyburide is an oral hypoglycemic agent used for type 2 diabetes, not type 1 diabetes, which requires insulin therapy. B. Insulin should be injected into the subcutaneous tissue, typically in areas such as the abdomen or thighs, not the deltoid muscle. C. Annual influenza vaccination is important for adolescents with type 1 diabetes to prevent infections that can affect blood glucose control. D. Glucagon is used to treat severe hypoglycemia, not hyperglycemia. For hyperglycemia, insulin adjustments are necessary.