Final answer:
The number of separate deliveries for creating a sales order for 3 mattresses can vary based on specific customer requirements, delivery routes, and inventory availability.
Step-by-step explanation:
In this case, the number of separate deliveries can vary based on specific customer requirements, delivery routes, and inventory availability. So, the correct answer is option D) It depends. For example, if the customer wants all three mattresses to be delivered together in a single shipment, then option A) 1 delivery would be chosen. However, if the customer wants each mattress to be delivered individually, then option C) 3 deliveries would be selected.