单项选择题 Which LPP status signifies the inability to return to a previous version of a fileset because the saved files have been removed?（）

单项选择题 What are the steps required to perform a Preservation install on a server?（）

单项选择题 An administrator migrates from AIX 5.3 to AIX 6.1. Upon completion, a client questions why files are missing from /tmp. How should the administrator respond to the client?（）