What is the best solution for dampening variability via demand classification?

NO.23 You are redesigning planning for supply chain that is facing the issue of variability.

What is the best solution for dampening variability via demand classification?
A . SAP IBP for Demand
B . SAP IBP for Demand Driven Replenishment
C . SAP IBP for Inventory
D . SAP IBP for Sales and Operations Planning

Answer: C