Which of the following statements best describes Level 2 (Increased Availability) in the Availability Index?

A.
The data is protected by backups that are stored off-site.

B.
The data is protected by online data protection (RAID or software).

C.
Downtime is treated individually without a plan or preventative measures.

D.
The system is protected, cluster of two servers, one becomes the backup for the other.

E.
The organization is protected against total loss by having an alternate site away from the main size.