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 Cm m:rw /etc/yum.conf
C . chattr CI /etc/yum.conf
D . setenforce 0