Which three statements are true?

You performed an incremental level 0 backup of a database: To enable block change
tracking after the incremental level 0 backup, you issued this command: To perform an
incremental level 1 cumulative backup, you issued this command: Which three statements
are true?

A.
Backup change tracking will sometimes reduce I/O performed during cumulative
incremental backups.

B.
The incremental level 1 backup that immediately follows the enabling of block change
tracking will not read the change tracking file to discover changed blocks.

C.
More than one database block may be read by an incremental backup for a change
made to a single block.

D.
The change tracking file must always be backed up when you perform a full database
backup.

E.
Block change tracking will always reduce I/O performed during cumulative incremental
backups.