Which of the following fsck commands will you use to check all filesystems listed in /etc/fstab?

The -f flag forces fsck to check a filesystem even if it appears clean (has the clean flag set), but it does not cause fsck to iterate through all filesystems in /etc/fstab.

The -P flag is a supplementary option used with -A to check the root filesystem in parallel with other filesystems, but it does not on its own check all filesystems in /etc/fstab.

The -A flag causes fsck to iterate through all entries in /etc/fstab and attempt to check each listed filesystem in the order determined by the pass number (fs_passno field). This is equivalent to running fsck individually against every filesystem defined in the fstab configuration file.

The -y flag automatically answers 'yes' to all fsck repair prompts, but it does not control which filesystems are checked or cause fsck to read from /etc/fstab.