An inventory decision rule$$ states, "When the inventory level goes down to $14$ gearboxes, $100$ gearboxes will be$$ ordered." Which of the following statements is$$ TRUE?

Part $2$

A$.$

The number $100$ is a function of demand during lead time.

B$.$

One hundred is the reorder$$ point, and $14$ is the order quantity.

C$.$

Fourteen is the safety$$ stock, and $100$ is the reorder point.

D$.$

Fourteen is the reorder$$ point, and $100$ is the order quantity.

E$.$

None of the above is true.