A nurse is caring for a client who has a prescription for a hypotonic IV fluid. Which of the following solutions should the nurse expect to administer?

A. Lactated Ringer's: This solution is isotonic and is typically used for fluid resuscitation, not for hypotonic treatment. B. 0.9% sodium chloride: This is isotonic saline and does not qualify as a hypotonic solution. C. 3% sodium chloride: This solution is hypertonic and used to treat severe hyponatremia, not hypotonic hydration. D. 0.45% sodium chloride: This is the correct choice as it is a hypotonic solution that can help to hydrate cells by providing free water.