C. diff
Explanation:
diff is a tool that compares the contents of two files line by line and highlights the differences between them. In this case, the analyst can use diff to compare the current sshd_config file with archived versions to identify what changes have been made over time.
Why the other answers are less suitable:
A. cat * | cut –d ‘,’ –f 2,5,7: This command concatenates files and uses cut to extract specific fields based on a delimiter. It’s not designed for comparing files.
B. more * | grep: This command allows the user to view files (more) and search for specific text (grep), but it doesn’t compare files or highlight differences between them.
**D. sort ***: The sort command arranges the contents of a file in a specified order. It’s not used for comparing file contents or identifying differences.