In order to display all currently mounted filesystems, which of the following commands could be used? (Choose TWO correct answers.)

The file `/proc/self/mounts` (which is a symbolic link to `/proc/mounts`) contains a list of all currently mounted filesystems, including their device, mount point, type, and options, making `cat` an effective way to display this information.

The `free` command provides information about free and used memory, swap space, and kernel buffers, not about mounted filesystems.

The `mount` command, when executed without any options or arguments, will list all currently mounted file systems, detailing their source, mount point, type, and mount options in a human-readable format.

`lsmounts` is not a standard Linux command for listing mounted filesystems; typical commands for this purpose are `mount`, `findmnt`, or reading `/proc/mounts`.

`cat /proc/filesystems` lists the filesystem types supported by the kernel, such as ext4, xfs, or fat, rather than the currently mounted instances of filesystems.