Obj-Browse allows you to return a page list of data on the clipboard, making it one of the correct options. Obj-Refresh-and-Lock can acquire the lock and refresh a page if it is stale, which is also correct. Obj-Open loads an instance of a class from a database onto the clipboard, confirming it as another correct option. Obj-Delete-By-Handle does not require a page on the clipboard to delete an instance, and Obj-Save does not always perform an immediate write to the database unless specified, so these are incorrect.