A nurse is teaching the parents of a child who has diabetes mellitus about the manifestations of hypoglycemia. Which of the following manifestations should the nurse include in the teaching?

A. Fruity breath odour: This is a sign of diabetic ketoacidosis (DKA), a condition associated with hyperglycemia, not hypoglycaemia. B. Diaphoresis: Sweating is a common sign of hypoglycemia due to the body's release of adrenaline in response to low blood sugar levels. C. Dry mucous membranes: This is typically associated with dehydration and hyperglycemia, not hypoglycaemia. D. Polyuria: Frequent urination is a symptom of hyperglycemia, as the body tries to excrete excess glucose through the urine.