单项选择题An administrator tries to change the checksum_offload setting on ent0, but the chdev command responds that the adapter is busy. What can be done to resolve this?()
A.Use chdev with -P flag and run cfgmgr.
B.Use chdev with -R flag and run cfgmgr.
C.Use chdev with -P flag and reboot the system.
D.Use chdev with -R flag and reboot the system.