Which configuration task is optional in ECS when enabling NetWorker with CloudBoost and ECS integration?

Which configuration task is optional in ECS when enabling NetWorker with CloudBoost and ECS integration?
A . Create a dedicated namespace for CloudBoost storage
B . Generate with S3 secret key to add to the CloudBoost configuration
C . Create an object user account for CloudBoost access
D . Create a dedicated storage pool for CloudBoost storage

Answer: D