Which configuration task is optional in ECS when enabling Dell EMC Isilon CloudPools and ECS integration?

Which configuration task is optional in ECS when enabling Dell EMC Isilon CloudPools and ECS integration?
A . Generate a S3 secret key to add to the CloudPools configuration
B . Install the CloudPools license in ECS
C . Create a dedicated storage pool for CloudPools storage
D . Create an object user account for CloudPools access

Answer: A