Which three statements are true concerning filesystems supported by Oracle Linux?
A.
An ext3 filesystem can be mounted as an ext2 filesystem.
B.
An ext4 filesystem can be mounted as an ext3 filesystem.
C.
The ext3 and ext4 filesystems both support multiple journaling modes.
D.
The btrfs filesystem includes a volume manager.
E.
The btrfs filesystem cannot be used for the root filesystem.
F.
The ext4 filesystem is a copy-on-write filesystem.