Final answer:
The nurse would first anticipate IV administration of fluid and furosemide (Lasix) in the treatment of a dehydrated patient in the Injury stage of AKI.
Step-by-step explanation:
The nurse first anticipated in the treatment of a dehydrated patient in the Injury stage of the RIFLE staging of AKI would be b. IV administration of fluid and furosemide (Lasix). In this stage, the patient may have decreased urine production and dehydration due to fluid loss. Intravenous administration of fluids and furosemide helps to rehydrate the patient and promote urine output.