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Whichcommandwillallowthecreationofa10-characterloginuse……

Which command will allow the creation of a 10-character login user name?() 

A.chlogin -a log_name=10
B.chdev -l sys0 -a max_logname=10
C.chusr extended_logname=true [userid]
D.chuser login_name=10 extended_logname=true [userid]