Replenishment Planning (C) in Oracle Fusion Cloud SCM ensures optimal inventory levels by predicting demand and adjusting supply plans proactively. Using forecasts-e.g., expecting 300 units next month-it triggers replenishments to maintain stock (e.g., ordering 250 units when levels hit 50), avoiding overstock or shortages. Option A (Cost Accounting) tracks costs, not inventory levels. Option B (Supplier Qualification) evaluates suppliers, not stock planning. Option D (Manufacturing Execution) manages production, not replenishment. This feature balances cost and availability, reducing waste (e.g., $5,000 in excess stock) and ensuring service continuity.