What are two requirements for configuring Optimized Duplication between two or more Backup Exec servers? (Choose two.)

What are two requirements for configuring Optimized Duplication between two or more Backup Exec servers? (Choose two.)
A . The Central Admin Server (CAS) and Managed Backup Exec Server (MBES) must be configured.
B . The NDMP option must be installed.
C . The OS must be similar on the Backup Exec servers where the Deduplication Folder needs to be shared.
D . The same Deduplication account must be used on all the Backup Exec servers.
E . The Deduplication storage on each Backup Exec server must be shared.

Answer: AE