The nurse is administering multiple prescribed vaccines to a toddler. Which strategy should the nurse prioritize to reduce the duration of pain?

A. Verbal reassurance: While helpful for reducing anxiety, verbal reassurance alone does not significantly shorten the duration of pain associated with multiple injections. B. Simultaneous injections: Administering multiple vaccines at the same time in different sites reduces the overall number of needle sticks and the total duration of pain the toddler experiences, making this the most effective strategy. C. Supine positioning: Proper positioning can improve safety and comfort during injections but does not directly decrease the duration of pain from the procedure. D. Physical soothing: Holding or comforting the toddler helps reduce distress and anxiety, but it does not shorten the actual time the pain stimulus occurs.