You need to configure a new computer to dual-boot to the following operating systems：  Microsoft Windows XP Professional Microsoft Windows Vista  Which two procedures should you perform？ （）

• A、Create two partitions. Install Windows XP Professional on the first partition. Boot the computer from the Windows Vista DVD-ROM. Install Windows Vista on the second partition.
• B、Create two partitions. Install Windows Vista on the first partition. Boot from the Windows XP Professional installation CD-ROM. Install Windows XP Professional on the second partition. 
• C、Create one partition. Install Windows XP Professional on the partition. From Windows XP Professional launch the Windows Vista setup utility. Install Windows Vista in the same partition. 
• D、Create two partitions. Install Windows XP Professional on the first partition. From Windows XP Professional launch the Windows Vista setup utility. Install Windows Vista on the second partition.