[单项选择] Companycom has successfully established their p5 LPAR environment on a POWER5 p5 590 running AIX 5.2. They are now ready to move to Virtual IO. What would be required to do Virtual IO?（）
A. Apply APAR IY62262 to the current AIX 5.2 Maintenance level 04. Virtual IO Server is not required. 
B. Purchase Advanced POWER Virtualization software, upgrade to AIX 5.3 maintenance level 1 and apply APAR IY60349. Virtual IO Server is not required. 
C. Verify that there are enough resources to add a Virtual IO Server, upgrade to AIX 5.3 with APAR IY60349, create a Virtual IO Server after applying APAR IY62262. 
D. Verify that there are enough resources to add a Virtual IO Server, create a Virtual IO Server and apply APAR IY62262, verify that the system is at AIX 5.2 with Maintenance level 04.