Northern Trail Outfitters (NTO) has an existing custom business-to-consumer (B2C) website that does NOT support...

To register and authenticate new customers on the website using Salesforce Identity, the identity architect should use Delegated Authentication and Embedded Login. Delegated Authentication is a feature that allows Salesforce to delegate the authentication process to an external service, such as a custom website, instead of validating the username and password internally. Embedded Login is a featurethat allows Salesforce to embed a login widget into any web page, such as a custom website, to enable users to log in with their Salesforce credentials. The other options are not relevant for this scenario. References: Delegated Authentication, Embedded Login