Which of the following find commands will print out a list of files owned by root and with the SUID bit set in /usr?

The `find` command is correctly structured with `/usr` as the path. `-uid 0` correctly identifies files owned by the root user, and `-perm +4000` matches files that have the SUID (Set User ID) bit set.

`-user root` is valid, but `+mode +s` is not a standard `find` predicate for SUID; `-perm +4000` is the correct way, and the path should be specified correctly.

`-type suid` and `-username root` are not valid `find` predicates; `-type f` or `d` etc. and `-user root` are correct, but `suid` as a type is incorrect. `-d /usr` is also an incorrect way to specify the path.

`-ls *s*` and `-u root` are not valid predicates for `find`; `-ls` performs a long listing, `*s*` is a shell glob, and `-u` is not for user.

`-suid` is not a standard `find` predicate; while `-perm +4000` correctly identifies the SUID bit, the first part is invalid.