Which statement regarding Cisco IP voice media streaming application is correct?

Which statement regarding Cisco IP voice media streaming application is correct?

A.
It should be activated on the gateway in cluster that supports the TFTP service.

B.
It should be activated on the gatekeeper in cluster that supports the TFTP service.

C.
It should be activated on the node in cluster that does not support the TFTP service.

D.
It should be activated on the node in cluster that supports the TFTP service.