Which two statements are true regarding the backups performed?

You are managing an Oracle Database 11g database with the following backup strategy:
1. On Sunday, an incremental level 0 tape backup is performed
2. Monday through Saturday, a cumulative incremental level 1 tape backup is performed
Which two statements are true regarding the backups performed? (Choose two.)

A.
The backup performed in step 1 backs up all blocks that have ever been in use in the database

B.
The backup performed in step 2 copies all the blocks changed since the most recent level 0
backup

C.
The backup performed in step 1 backs up all the blocks changed since the most recent level 1
backup

D.
The backup performed in step 2 backs up all blocks that have changed since the most recent
incremental backup at level 1

Explanation:
backup-level
Description
The backup-level placeholder specifies the level of a backup created with the backup command.
Syntax
backup-level::=
full | incr_level | incr | offsite
incr_level::=
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
Semantics
full
Specifies that Oracle Secure Backup should back up all files defined in a dataset regardless of
when they were last backed up. This option is equivalent to level 0. This is the default value.
incr_level
Specifies an incremental level from 1 to 9 and backs up only those files that have changed since
the last backup at a lower level.
incr
Specifies that Oracle Secure Backup should back up any file that has been modified since the last
incremental backup at the same level or lower. The incr option is equivalent to level 10. This level
is platform dependent and is incompatible with some client operating systems such as the Netapp
filer’s Data ONTAP.
offsite
Equivalent to a full (level 0) backup except that Oracle Secure Backup keeps a record of this
backup in such a way that it does not affect the full or incremental backup schedule. This option is
useful when you want to create a backup image for offsite storage without disturbing your
schedule of incremental backups.