A lawnmower assembly plant uses a variety of​ nuts, bolts,​ screws, and other fasteners in its operation. Its supplier delivers these items directly to the point of use on the assembly line and ensures that there are always sufficient quantities of fasteners to maintain the production schedule. This is an example of
A. ​e-procurement.
B. ​vendor-managed inventory.
C. postponement.
D. single stage control of replenishment.