An IT director is eager to adopt POWER7 servers because of their relative performance ratings and energy efficiency, but is concerned about migrating applications which require AIX 5.3.<br /> Which of the following will address his concern?()
A、POWER7 servers running AIX 5.3 operate in POWER5+ mode.
B、POWER7 servers running AIX 5.3 operate in POWER6 and POWER6+ mode.
C、POWER7 servers running AIX 5.3 operate in POWER5 and POWER6 modes.
D、POWER7 servers running AIX 5.3 operate in POWER6 and POWER7 modes.