When enabling Dell EMC NetWorker with CloudBoost and ECS integration, which configuration task is optional in ECS?

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

Answer: B