The Order of the Steps in the SAP R/3 Production

The order of the steps in the SAP R/3 production planning process are:

A) Sales Forecasting, Demand Management, Sales and Operations Planning, MRP
B) Sales Forecasting, Demand Planning, Demand Management, MRP
C) Sales and Operations Planning, Sales Forecasting, MRP, Demand Management
D) Sales Forecasting, Sales and Operations Planning, Demand Management, MRP