The nurse is caring for four clients: Client A, who has emphysema and whose oxygen saturation is 94% on room air; Client B, with a postoperative hemoglobin of 8.2 mg/dL (82 g/L); Client C, newly admitted with a potassium level of 3.8 mEq/L (3.8 mmol/L); and Client D, scheduled for an appendectomy who has a white blood cell (WBC) count of 14,000 mm2 (14 x 10L). Which intervention should the nurse implement? Reference Range: Hemoglobin [14 to 18 g/dL (140 to 180 g/L)] Potassium [3.5 to 5.0 mEq/L (3.5 to 5.0 mmol/L)] White Blood Cell [5,000 to 10,000/mm3 (5 to 10 x 109/L)]

A. Client A's oxygen saturation of 94% is within an acceptable range for someone with emphysema, and increasing oxygen may not be necessary at this time. B. Moving Client D into an isolation room may not be necessary based solely on the elevated WBC count, which could indicate an infection but does not mandate isolation without additional symptoms. C. Client C’s potassium level of 3.8 mEq/L is within the normal range, so there is no urgent need to add a banana. D. Verifying that Client B has two units of packed cells available is critical due to the low postoperative hemoglobin level, indicating a need for potential transfusion.