The administrator changed the number of virtual processors from 1 to 2 in the default_profile of an LPAR. The operator ran the cfgmgr command expecting to see 2 processors after that， but did not see them. What action must be done to apply the changes？（）

• A、Reboot AIX within the LPAR.
• B、Run cfgmgr against the device sys0.
• C、Shutdown and then activate the default_profile.
• D、Ensure the RSCT daemon is operative and run cfgmgr again.