In a Data Domain Cloud Tier environment, which configuration task is required in Data Domain System Manager to enable ECS as a long-term retention device?

In a Data Domain Cloud Tier environment, which configuration task is required in Data Domain System Manager to enable ECS as a long-term retention device?
A . Export self-signed/CA-signed root certificate
B . Create a device in ECS to hold the Data Domain metadata
C . Create Data Domain Cloud Units for ECS
D . Enable Data Domain file system before enabling Cloud Tier

Answer: C