Which license is required for vSAN Data-At-Rest Encryption, and what is characteristic of this type of encryption?

Which license is required for vSAN Data-At-Rest Encryption, and what is characteristic of this type of encryption?
A . Requires vSAN Enterprise Plus
Applies to the entire datastore
B . Requires vSAN Standard
Applies on a per VM basis
C . Requires vSAN Advanced
Applies on a per VM basis
D . Requires vSAN Enterprise
Applies to the entire datastore

Answer: D