Final answer:
The claim that kanban is a primarily manual system is false; kanban can be electronic too. Kanban and MRP are different in that MRP is typically a complex, computer-based system for managing production and inventory.
Step-by-step explanation:
The assertion that a major difference between kanban and Material Requirements Planning (MRP) is that kanban is primarily a manual system is B. False. Kanban can be both a manual and an electronic system, utilized to signal the need to move materials within a production facility or to control the work pace. In contrast, MRP is a more complex system, typically computer-based, which schedules production and manages inventory levels based on sales forecasts and other factors.