What permissions and licenses are required for users to access Einstein Sales Emails?

The option identifying the need for the Einstein Sales Emails permission set and the Einstein for Sales add-on license is correct because accessing Einstein Sales Emails specifically requires both components. The Einstein Sales Emails permission set grants users the necessary privileges to utilize the features associated with Einstein Sales Emails, while the Einstein for Sales add-on license provides the core capabilities related to Einstein functionalities relevant to sales processes.

Having the permission set alone would not suffice without the appropriate Einstein for Sales add-on license, as this license is critical for leveraging the advanced AI-driven insights and features that Einstein Sales Emails provides. Thus, the combination ensures that users not only have the access rights but also the necessary license to utilize the functionality within the Salesforce environment effectively.

Considering this, the other options do not align with the requirements for accessing Einstein Sales Emails, as they either mention incorrect license types or permissions that do not apply specifically to this feature within Salesforce.