A nurse is preparing to insert a peripheral intravenous (IV) catheter for a preschooler. Which of the following actions should the nurse take?

A. Ask the child to hold their breath while the IV catheter is placed: This technique is not appropriate for a preschool-age child. Breath-holding may increase anxiety and is more applicable to older children or adults during procedures such as injections or venipuncture. B. Place the IV catheter on the dominant arm: The non-dominant arm is usually preferred for IV insertion to reduce interference with the child's movement and play, and to prevent dislodgement of the catheter during activity. C. Apply vapocoolant spray before the IV insertion: Vapocoolant sprays provide topical analgesia and can reduce the pain and anxiety associated with IV placement. This is especially helpful for young children like preschoolers and is recommended for pain management. D. Explain the procedure to the child in detail: Preschoolers benefit from simple, age-appropriate explanations rather than detailed medical descriptions. Using clear, brief explanations or play-based preparation is more effective for their developmental level.