How Can Data at Rest Encryption Be Activated on Dell

Multiple Choice

How can data at rest Encryption be activated on Dell EMC Unity?

A) Enable Data at rest Encryption at any time using Unisphere settings > manage Encryption
B) Enable data at rest Encryption, but only during initial configuration, using Unisphere settings > Manage Encryption
C) Install data at rest Encryption license at any time using Unisphere Settings > Install License
D) Install data at rest Encryption, but only during initial configuration