* Option A is correct because authentication credentials should be stored and managed by Experience Cloud as the system of record for this customer data. Experience Cloud acts as an identity provider (IDP) for commerce, meaning that it verifies the identity of customers who log in to ecommerce sites using their communities credentials. Experience Cloud can also leverage Salesforce Identity features to provide secure and seamless authentication across multiple Salesforce clouds and external systems.
* Option B is incorrect because address book should not be stored and managed by Experience Cloud as the system of record for this customer data. Address book is mainly used for ecommerce purposes, such as shipping and billing addresses, and it should be stored and managed by B2C Commerce as the system of record. B2C Commerce can also integrate with Experience Cloud to provide a consistent user experience across ecommerce sites and communities.