An administrator has a server that must be upgraded from AIX 5.2 to AIX 5.3. The administrator also needs to use the 64-bit kernel with JFS2 filesystems in rootvg. All critical data resides in a non-rootvg volume group. Which of the following types of install could the administrator use to accomplish this？（）
- AMigration Installation
- BUpdate_All Installation
- CPreservation Installation
- DNew and Complete Overwrite Installatio