单选题A user is unable to determine the default system texteditor. How can the local administrator assist the user by identifying the default text editor for the system?（）ALogin as the user and run 'echo $ENV'.BLogin as root and run the 'env' command.CLogin as root and 'cat /etc/environment'.DLogin as the user and run the 'env' command.
单选题
A user is unable to determine the default system texteditor. How can the local administrator assist the user by identifying the default text editor for the system?（）
A
Login as the user and run 'echo $ENV'.
B
Login as root and run the 'env' command.
C
Login as root and 'cat /etc/environment'.
D
Login as the user and run the 'env' command.
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