Answer:
E. III and IV only
Explanation:
The MRP which is the Material requirements planning is an inventory management system designed to improve productivity of a business by assisting production managers in scheduling and placing orders of items of dependent demand. That is, it aids in planning, scheduling and controlling inventory during the manufacturing process. The material requirements planning can also be attached to services by focusing it on service components around the business and also focusing it on materials used during the service process.