Using ______ API endpoints, you can create a new ACD webchat and interface on behalf of the customer.

The correct choice is related to the functionality of creating a new ACD webchat and interface on behalf of the customer using Guest Chat API endpoints. These endpoints are designed specifically to facilitate interactions where the customer or user does not have to be authenticated. This means a guest user can initiate a chat session without needing to provide login credentials, simplifying the user experience and making it more accessible.

In the context of ACD (Automatic Call Distribution) webchat, the Guest Chat API allows for the initiation of a chat interaction that can still leverage the backend systems for routing and managing the conversation while not requiring the user to be a registered agent or logged in. This ease of accessibility is vital for engaging users who may prefer not to create an account or log in before seeking assistance or initiating a chat.

The other options typically involve scenarios where authentication and user identification are required, making them less suitable for creating a chat interface on behalf of a guest customer.