Which statement is true about checking the Logical Volume Manager (LVM) Snapshot statistics?

Which statement is true about checking the Logical Volume Manager (LVM) Snapshot statistics?

A.
It could be checked using the dumpe2fs command.

B.
It could be displayed up-to-date after flushing the disk cache using the sync command.

C.
It could be checked using thelvdisplay command, after unmounting the Logical Volumes.

D.
It could be checked using thelvm.static command, after unmounting the Logical Volumes.