Which XPath constraint allows users to view only their own notifications?

The correct choice focuses on the use of an XPath constraint that effectively filters notifications so that users can see only those associated with their own accounts. In this case, the constraint [Notifications.Notification_Account='[%CurrentUser%]'] checks if the Notification_Account attribute of the notifications matches the current user making the request, represented by [%CurrentUser%].

This allows the application to dynamically fetch only the notifications relevant to the logged-in user, enhancing the user experience by ensuring they are not overwhelmed with notifications belonging to others. The critical aspect here is the correct identification of the attribute that links notifications with user accounts, ensuring that users only receive personalized content.

The other options do not correctly reference the appropriate relationship between notifications and the current user, either referencing the wrong attribute or structure, which would not reliably filter results as intended.