A client requires an IV antibiotic piggyback. The nurse understands that the primary IV solution with gravity flow tubing needs to be hung:

The correct answer is A: higher than the piggyback medication. This is because when the primary IV solution is hung higher than the piggyback medication, it allows gravity to assist in infusing the piggyback medication after the primary infusion is completed. This ensures that the piggyback medication is delivered effectively and prevents backflow into the primary line. Hanging the primary IV solution lower than the piggyback medication (option B) would not provide the necessary gravity flow for the piggyback medication. Placing the primary IV solution at the same height as the piggyback bag (option C) would not allow for proper infusion sequencing. Hanging the primary IV solution lower than the IV insertion site (option D) could lead to infiltration or occlusion.