A nurse teaches a client with diabetes mellitus about sick day management. Which statement should the nurse include in this client's teaching?

Choice A rationale: During an illness, the body is under stress, which can lead to increased blood glucose levels. To prevent dehydration and ketosis, it is critical to continue to consume fluids and carbohydrates, even if vomiting. Small, frequent sips of liquids containing electrolytes and sugar are often recommended to maintain hydration and energy. Choice B rationale: Illness, stress, and dehydration can significantly alter blood glucose levels. Monitoring blood glucose at least every 4 hours allows for timely adjustments to insulin or oral medications, helping to prevent diabetic ketoacidosis or severe hypoglycemia. This frequent monitoring is a cornerstone of safe sick day management for clients with diabetes. Choice C rationale: Even when vomiting, clients with type 1 diabetes must continue to take insulin to prevent diabetic ketoacidosis, which can be life-threatening. The dose may need adjustment based on frequent blood glucose monitoring, but it should not be discontinued. Clients with type 2 diabetes on oral agents may need a temporary switch to insulin. Choice D rationale: Exercise can be beneficial for managing blood glucose, but during an acute illness, it is not recommended. The body's energy is needed to fight the infection. Intense physical activity can also increase the risk of dehydration and, in some cases, can paradoxically raise blood glucose levels, particularly if the client is already ill.