When working with the CyberArk Disaster Recovery (DR) solution, which services should be running on the DR Vault?

When working with the CyberArk Disaster Recovery (DR) solution, which services should be running on the DR Vault?
A . CyberArk Vault Disaster Recovery (DR), PrivateArk Database
B . CyberArk Vault Disaster Recovery
C . CyberArk Vault Disaster Recovery, PrivateArk Database, PrivateArk Server
D . CyberArk Vault Disaster Recovery, PrivateArk Database, CyberArk Event Notification Engine

Answer: D