Given the output below:
[root@appserver ~]# rm config.txt rm: remove regular file ‘config.txt’? yes rm: cannot remove ‘config.txt’: Operation not permitted Which of the following might be the cause?
A. The file config.txt does not have the user write bit set.
B. The file config.txt does not exist.
C. The file config.txt has the immutable attribute set.
D. The file config.txt has an ACL that does not permit deletion by others.
