Which action changes the default editor for ALL users on the system from vi to edit of the following?()
A、Issue the command:  export EDITOR=/usr/bin/edit
B、Modify /.profile and change the EDITOR variable to /usr/bin/edit
C、Modify /etc/environment and add  EDITOR=/usr/bin/edit  export EDITOR
D、Modify /etc/security/defaults and change the EDITOR value to /usr/bin/edit
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