You have been called in as a consultant toset up a Kanban control system. The first thing to do is to determine the number of Kanban card sets needed. Your research shows that the expected demand during lead time for a particular component is 150per hour. You estimate the safety stock should be set at 25% of the demand during lead time. The tote trays used as containers can hold 8 units of stock and the lead time it takes to replenish an order is 2 hours. Which of the following is the number of Kanban card sets necessary to support this situation? A. 42B. 47C. 68D. 89E. 9455.