单项选择题

A.p5-550 with the Advanced POWER Virtualization feature and AIX 5.2
B.p5-550 with the POWER5 processor technology and AIX 5.2
C.p5-570 with the Advanced POWER Virtualization feature and AIX 5.3
D.p5-570 with the POWER5 processor technology and AIX 5.2