Ann, a Junior Systems Administrator, Is Required to Add a Line

Multiple Choice

Ann, a junior systems administrator, is required to add a line to the /etc/yum.conf file. However, she receives the following error message when she tries to add the line: Ann performs some diagnostics to attempt to find the root cause: Which of the following commands should Ann execute to write content to /etc/yum ?

A) chmod 755 /etc/yum.conf
B) setfacl -m m:rw /etc/yum.conf
C) chattr -i /etc/yum.conf
D) setenforce 0