The correct answer is: A. /etc/.profile
The /etc/.profile
file is a shell script that is executed for all users when they log in. It is used to set environment variables and other settings that are common to all users.
The /etc/.bashrc
file is a shell script that is executed for each user when they open a new Bash shell. It is used to set environment variables and other settings that are specific to the user.
The /etc/.log
file is a log file that is used to store system logs. It is not used to set bash global defaults for all users.
The /etc/profile
file is the correct answer because it is executed for all users when they log in and it is used to set environment variables and other settings that are common to all users.