To Prevent a Specific User from Scheduling Tasks with At

Multiple Choice

To prevent a specific user from scheduling tasks with at, what should the administrator do?

A) Add the specific user to /etc/at.allow file. Add the specific user to /etc/at.allow file.
B) Add the specific user to [deny] section in the /etc/atd.conf file . [deny] section in the /etc/atd.conf file .
C) Add the specific user to /etc/at.deny file . /etc/at.deny file
D) Add the specific user to nojobs group . nojobs group
E) Run the following: atd --deny [user]. Run the following: atd --deny [user].