Which company is among C3PO's largest customers?

The correct choice reflects that the Oriental Trading Company is a significant customer for C3PO, which is known for its services and products related to business operations and supply chain management. The relationship suggests that C3PO's offerings align well with the needs of the Oriental Trading Company, especially in terms of operational efficiency and effective inventory management.

In the context of the other companies mentioned, while Walmart, Amazon, and Costco are well-established enterprises utilizing technology and logistics services, they may not have the same level of reliance on C3PO's specific offerings as seen with the Oriental Trading Company. Each of these larger retailers has their own extensive supply chain systems and often engages multiple vendors for their needs. This specificity makes the connection between C3PO and the Oriental Trading Company particularly notable, emphasizing the tailored services that C3PO provides to meet the unique demands of its customer base.