In order to improve productivity, a manufacturing operation using a dual card kanban production control system might

A.  simultaneously employ an MRP system to better control production scheduling

B.  instruct workers to increase the utilization of equipment by producing wheneve there is time to do so, under the assumption that it will eventually will be needed

C.  deliberately remove the kanban from the system in order to uncover and then correct problems hidden by excess buffer inventory somewhere in the factory

D.  all of the above actions would be taken to improve productivity when using kaban production control system