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 Log
题目
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.