A new mother on the postpartum unit runs out of the room screaming that her newborn infant's crib is empty and the baby is missing. Which action should the nurse take first?

Choice A reason: The immediate activation of the lockdown procedure is critical in the event of a suspected infant abduction, as it helps to secure the facility and prevent the unauthorized removal of the infant. Choice B reason: Matching ID bands is a standard procedure but not the first action to take in a potential abduction scenario. Choice C reason: Asking the mother about expected visitors is part of the investigation but does not take precedence over securing the facility. Choice D reason: Determining if the newborn is in the nursery is important but should follow the immediate security measures.