Answer:
(D). Long-term relationships
Step-by-step explanation:
The Just-in-time (JIT) inventory system involves getting raw materials from suppliers just as they are needed for production.
This is a strategy used to increase efficiency in an organization and reduce wastage. An example is seen in the Toyota manufacturing process.
This JIT system requires trust between manufacturers and suppliers and as such, maintaining a good long-term relationship with suppliers is necessary.