What is a characteristic of an EMC Avamar NDMP backup?

A.
After the first Level 0 backup, Level 1 backups are performed and merged to a full backup
B.
Every backup is a Level 0 backup
C.
Level 1 backups are performed daily and merged to a full backup at the end of the week
D.
Each backup is a Level 1 backup and is merged to a full backup only when a restore request is received
A.
After the first Level 0 backup, Level 1 backups are performed and merged to a full backup
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