An NS Control Station is unable to access the back-end when the administrator runs the nas_disk
command. What could be the potential problem?

A.
The direct fibre connection between the Control Station and the storage back-end has failed

B.
The heartbeat service between the Control Station and Data Mover has failed

C.
The NBS between the Control Station and the Data Mover has failed

D.
The SMB. daemon on the Control Station has failed

Explanation: