What is the proper way to ensure that updates to the /etc/aliases file are seen by sendmail？（）

A.sendmail -bt
B.sendmail -ba
C.refresh -s sendmail
D.startsrc -s sendmail

A.Server is not running  rpc.lockd
B.Client is not running the rpc.statd
C.Filesystem not exported by the server
D.Client nfsd daemons are all inoperative

A.Remove the /etc/resolv.conf file
B.Unset the NSORDER environment variable
C.Add the following line to /etc/netsvc.conf： hosts=nis，bind，local
D.In a NIS and DNS environment， NIS takes precedence so there is nothing to change