Correct Answer: A

Rationale: Urine specific gravity is the most accurate indicator of hydration status in this scenario.

Correct Answer: B

Rationale: The primary goal of a proton pump inhibitor (PPI) is to reduce stomach acid, which alleviates gastrointestinal pain. Asking about pain levels is the most direct way to assess whether the medication is effective.

Correct Answer: A

Rationale: Stopping the transfusion prevents further reactions, and notifying the healthcare provider ensures timely intervention.

Correct Answer: A

Rationale: A serum creatinine level of 2.0 mg/dL indicates possible acute kidney injury, which can occur during severe systemic inflammatory response syndrome (SIRS). Reporting this value promptly allows for interventions to prevent further renal damage.

Correct Answer: A

Rationale: Unilateral leg swelling following a long flight may indicate a pulmonary embolism, which is a life-threatening complication requiring immediate attention.