A work centre uses 900 kg of a certain material each day. The material is transported in a container that holds 27 kg each. A kanban will take an average of 0.5 day to complete a cycle. The manager has:
a. Ordered 34 containers
b. Implemented a kanban system with 33 containers
c. Decided to order 32 containers
d. Opted for a kanban system with 31 containers