Sales reps want the ability to see who can view their account records and how...

The "Sharing" button should be added to the Account page layout to allow sales reps to view the sharing details of an account record. This button enables users to see how access to the record is granted via roles, groups, and manual sharing.

A: Sharing Hierarchy provides a view of the role hierarchy but does not specifically detail record access.

B: New Task is unrelated to sharing visibility.

D: "Fait" is not recognized in Salesforce context as a valid component or feature. Reference: Sharing an Account in Salesforce Help Documentation