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单项选择题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

  • C

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