Which service would you use to manage payment processing in Salesforce B2C Commerce?

Payment Services is the correct choice for managing payment processing in Salesforce B2C Commerce because it is specifically designed to handle all aspects of payment transactions. This service includes features for managing various payment methods, processing transactions securely, and integrating with third-party payment gateways. By leveraging Payment Services, developers can ensure that customers have a seamless and secure checkout experience, while also complying with financial regulations and standards.

The other options, while integral to the overall e-commerce platform, do not serve the purpose of payment processing. The Order API focuses on managing orders and their statuses. The Shipping API is concerned with managing shipping-related functionalities such as rate calculations and shipping options. The Inventory API deals with stock management, tracking inventory levels, and managing product availability. Each of these services plays a crucial role in the e-commerce ecosystem, but they do not directly handle payment processing, making Payment Services the dedicated and appropriate choice for that functionality.