A nurse is admitting a client who has diabetic ketoacidosis. Which of the following types of continuous infusions should the nurse initiate?

A. 0.9% normal saline: Initial fluid resuscitation in diabetic ketoacidosis (DKA) requires isotonic fluids like 0.9% normal saline to restore intravascular volume, improve perfusion, and correct electrolyte imbalances. This is the first-line intervention before initiating insulin therapy. B. 0.45% saline: Half-normal saline is hypotonic and may be used later in DKA management if the client is stable and serum sodium is elevated. It is not appropriate as the initial continuous infusion because it does not provide adequate intravascular volume replacement. C. Glargine insulin: Glargine is a long-acting insulin used for basal glucose control, not for acute management of DKA. Continuous IV insulin is required to rapidly reduce blood glucose and ketone levels. D. NPH insulin: NPH is an intermediate-acting insulin administered subcutaneously. It is not suitable for continuous IV infusion in DKA, as IV insulin is preferred for rapid and controlled glucose reduction.