Refer to the Exhibit.
An administrator is reviewing a vSphere Distributed Resource Scheduler (DRS) enabled Cluster and observes unexpected behavior as shown in the Exhibit.
What are three potential causes of the cluster imbalance? (Choose three.)
A . A local device is mounted to one or more virtual machines.
B . DRS rules prevent virtual machines from being moved.
C . vMotion is not configured and enabled.
D . There are insufficient cluster resources to perform the migration.
E . DRS has been configured for a conservative migration threshold.