You just finished upgrading a cluster to ONTAP 9.1 and would like to enable NetApp Volume Encryption (NVE)
on an existing volume. You do not have NetApp Storage Encryption (NSE) drives installed.
Which three steps would you take to accomplish this task? (Choose three.)

A.
Replace drives with NSE drives.

B.
Modify the volume options with the –encrypt true parameter.

C.
Install the NVE license.

D.
Execute the key manager setup wizard.

E.
Perform volume move operation using the –encrypt-destination true parameter.

Explanation:
You must install the NVE license and enable onboard key management before you can enable volume
encryption. You can enable encryption on a new volume or on an existing volume.
You can use the volume move start command to enable encryption on an existing volume. You can use the
same aggregate or a different aggregate.
http://docs.netapp.com/ontap-9/index.jsp?topic=%2Fcom.netapp.doc.pow-nve%2FGUIDEAD13D8E-0219-45B6-A2C6-B25B76C9CA1A.html