Final answer:
MRP is a subset of MRP II, which in turn is less comprehensive than ERP systems, as ERP represents an evolution encompassing a wide range of business processes.
Step-by-step explanation:
The terms ERP (Enterprise Resource Planning), MRP (Material Requirements Planning), and MRP II (Manufacturing Resource Planning) are related in that each represents an evolution in the approach to managing a company's resources. The correct answer is b) MRP is a subset of MRP II, and ERP is an evolution of MRP II. MRP is primarily concerned with the scheduling of materials and is a component of the broader MRP II system, which includes additional features like labor and machine scheduling. ERP systems have evolved from MRP II concepts to encompass a wider range of business processes, including finance, human resources, and customer relationship management.