When developing a teaching plan for a client with newly diagnosed type 1 diabetes mellitus, the nurse should explain that an increased thirst is an early sign of diabetic ketoacidosis (DKA). Which action should the nurse instruct the client to implement if this sign of DKA occurs?

A. Resuming normal physical activity is not advisable if the client is experiencing symptoms indicative of DKA. B. Drinking electrolyte fluid replacements can be beneficial but does not address the underlying issue of hyperglycemia. C. Measuring urine output may provide useful information but is not an immediate intervention for DKA. D. Giving a dose of regular insulin as prescribed is crucial in managing DKA, as it helps to lower blood glucose levels and address the metabolic derangement.