Which of the Following Situations Is an Example of Inventory

Which of the following situations is an example of inventory being held as a way to balance supply and demand?

A) A manufacturer holds inventory of key components to maintain a level production schedule.
B) A manufacturer of seasonal products builds finished-goods inventory before the peak selling period.
C) A distributor maintains safety stock of slow-moving items at a central distribution center.
D) A retailer stocks a variety of sizes and colors of a fast-selling item to avoid losing sales.