How do you specify that pool1/data should not contain duplicate data blocks on write operations?

To reduce the use at storage space on your server, you want to eliminate duplicate copies of data
in your server’s ZFS file systems. How do you specify that pool1/data should not contain duplicate
data blocks on write operations?

A.
zfs create –o compression=on pool1/data

B.
zpool create –o deduplication=on pool1 ; zfs create pool1/data

C.
zpool create –o dedupratio=on pool1 ; zfs create pool1/data

D.
zfs create –o dedupratio=2 pool1/data

E.
zfs create –o dedup=on pool1/data

Explanation:
To c reate a file system with deduplication:
root@solaris:~# zfs create -o dedup=on
Note: If you have a storage pool named ‘tank’ and you want to use dedup, just type this:

zfs set dedup=on tank