Which of the following is the most cost effective required solution to support the boot disks internally for two partitions on a p5-520 running AIX 5.3 without the Advanced Virtualization feature？（）

• A、Optional 4-pack
• B、7311-D20 RIO drawer
• C、Optional 4-pack and a 7311-D20 RIO drawer
• D、Optional 4-pack attached to a PCI SCSI card