When using server and client side data deduplication, which configuration tasks must be performed?

Upgrade the server and client to V6.1.
The client must have the client side deduplication option enabled.
Set deduprequiresbackup to yes
The target storage pool must be a deduplication enabled storage pool.

A.
1, 2

B.
1, 3

C.
2, 3

D.
2, 4