Which of the Following Statements Is Incorrect About Managing Inventory

Which of the following statements is incorrect about managing inventory in supply chains?

A) In a supply chain,a single firm typically controls all of the inventories that are required while manufacturing a product.
B) Coordination among supply chain partners is essential while managing inventory across the supply chain.
C) The total cost minimization approach can be applied while managing inventory across the supply chain.
D) None of the above