What are the steps required to perform a Preservation install on a server？（）

A.Shutdown the server and boot it into SMS.Select SMS menu option OS Upgrade，Preservation install for the install type，and allow upgrade to run

B.Shut down the server and perform a network boot from a local NIM server.Select Presevation install for the install type，and allow upgrade to run

C.Shutdown the server and boot it into SMS.Select SMS menu option OS Upgrade，Presevation install for the install type，and allow for upgrade to run

D.Re-boot the server and NFS mount the bos images from a local NIM server.Run smit install.Select Presevation install for the install type，and allow upgrade to run