Choice "D" is correct. Just-in-time has the goal to minimize the level of inventory carried. Typical characteristics include lot sizes equal to one, insignificant set-up times and costs, and balanced and level workloads. In a just-in-time environment, the flow of goods is controlled by a "pull" approach, where an item is produced only when it is needed down the line, and not a "push-through" system.
Choices "a", "b", and "c" are incorrect based on the above explanation.
