Answer:
d. parts enter the manufacturing process immediately; they are not warehoused.
Explanation:
The Just in Time inventory system is one where the management of a business increases efficiency and reduces inventory cost by obtaining raw materials for the production process just as they are needed.
This implies warehousing of unused raw materials is at a minimum. Thereby reducing warehousing cost.
So the option most close to JIT inventory method is - parts enter the manufacturing process immediately; they are not warehoused.
This method also requires accurate forecasting get what is actually needed per time.