A System p administrator in a manufacturing customer plans to migrate an AIX 5.2 system to a new LPAR on an existing System p using VIOS.  Which of the following must be completed prior to this migration （）

• A、Upgrade system firmware to latest level
• B、Upgrade to AIX 5.3
• C、Upgrade HMC to version 6.1
• D、Convert rootvg filesystems to JFS2