Which two statements about the yum-fs-snapshot plugin are true?
A. It automatically creates file system snapshots for all file systems before running a yum transaction.
B. It can be used to manually create file system snapshots before running a yum transaction.
C. It can be used when the root file system is deployed on btrfs.
D. It can be used when the root file system is deployed on an VLM volume.
E. It is enabled by default for all types of root file systems.