The current ZFS configuration on server is: 

You need to backup the /data file system while the file system is active. Select the option that creates a full backup of the /data file system and stores the backup on server in the pool named backup. 

Answer options:

A. Mount -F nfs system: /backup / mnt zfs snapshot pool/data@monday>/mnt/Monday
B. Mount -F nfs systemB: /backup/mnt zfs snapshot pool1/data@Monday zfs clone pool1/data@monday/mnt/Monday
C. Zfs send pool1/data@Monday | ssh system zfs recv backup/monday
D. Zfs snapshot pool1/data@Monday | ssh system zfs recv backup/monday

D

Example (assuming there exists a snapshot tank/test@1). Full backup - Now lets do a full initial backup from the tank/test@1 snapshot: # zfs send tank/test@1 | zfs receive tank/testback