How would the system administrator turn on Dynamic Processor Deallocation？（）

• A、Use the diag menu to set dynamic deallocation to ’on’
• B、Use the chdev command to enable the ’cpuguard’ attribute of sys0
• C、Use the cfgmgr command to change the ’monitor’ attribute of proc0
• D、Use the smitty command with the fast path dynamic_processor_deallocation to turn it on