A nurse is caring for a client who has a prescription for parenteral therapy. Which of the following actions should the nurse take when initiating IV therapy?

A. "Insert the IV catheter using the Z-track technique." The Z-track technique is used for intramuscular (IM) injections, not IV therapy. B. "Insert the IV catheter with the bevel down." The bevel should be up to facilitate smooth vein entry. C. "Remove the roller clamp from the tubing prior to IV insertion." The roller clamp should remain in place to control fluid flow and prevent air from entering the tubing. D. "Apply the tourniquet 5 to 10 cm (about 2 to 4 in) above the IV insertion site." This placement helps distend the vein for easier cannulation without restricting arterial blood flow.