Which of the Following Defines a Just-In-Time Logistic System

Which of the following defines a just-in-time logistic system?

A) where producers and retailers carry only small inventories of merchandise lasting for a few days
B) where retailers have products in storage for long periods to avoid interruption in supply
C) where producers supply products to the sellers well in advance
D) where producers only supply products when specific instructions are obtained for the products from sellers
E) where producers carry a large supply of parts and store them until sellers take possession of them