You need to implement the notifications for the custom list app named Admin. Which code segment should you add at line ER08?

A plain class with no base class inheritance provides no SharePoint event receiver infrastructure and cannot be registered or fired by the SharePoint event system.

SPListEventReceiver handles list-level events such as list creation or deletion, not item-level operations like add or update within a list.

SPItemEventReceiver is the correct base class for handling item-level events such as ItemAdded, ItemUpdated, and ItemDeleted on a SharePoint list. For a custom list app named Admin that requires notifications triggered by list item operations, inheriting from SPItemEventReceiver provides the necessary overridable event handler methods. This class is specifically designed for synchronous and asynchronous item event handling within a list context.

SPEventReceiverBase is the abstract root base class in the hierarchy and is not intended for direct inheritance in custom event receiver implementations - it lacks item-specific event handler stubs.