Following IFRS, Which of the Following Statements Is Not Correct

Following IFRS, which of the following statements is not correct?

A) Firms determine the lower-of-cost-or-market value of inventory using individual-items or groups of items.
B) IFRS inventory write-downs can be reversed later if the net realizable value of inventory increases.
C) The net realizable value of inventory is calculated as the estimated selling price plus the estimated costs of completion and sale.
D) IFRS-reporting firms determine if a write-down for inventory is needed by comparing the historical cost and the net realizable value of inventory.