What is true about resource pools created on a Distributed Resource Scheduler (DRS) cluster?

What is true about resource pools created on a Distributed Resource Scheduler (DRS) cluster?
A . A root resource pool is created with the specified values.
B . A root resource pool is automatically created using the aggregate total of the ESXi host resources in the cluster.
C . A root resource pool is automatically created using the aggregate total of all resources in the datacenter.
D . A root resource pool is not needed when creating resource pools on a DRS cluster.

Answer: B