The nurse is caring for a group of patients. Which patient is at highest risk for hypovolemia?

A. Receiving 6 liters of IV fluid increases intravascular volume, making hypovolemia unlikely in this patient. B. A patient with a urinary tract infection on oral or IV medications is at low risk for hypovolemia unless experiencing severe vomiting or diarrhea. C. Blood loss of 2 liters during surgery significantly reduces circulating blood volume, placing this patient at the highest risk for hypovolemia, which can lead to hypotension, tachycardia, and shock if not corrected promptly. D. Patients with congestive heart failure are more at risk for fluid overload rather than hypovolemia due to impaired cardiac output and fluid retention.