Which statement is true about the last Cisco voicemail port configured in Cisco CallManager?

Which statement is true about the last Cisco voicemail port configured in Cisco CallManager?

A.
The last voicemail port should be forwarded to the first voicemail port.

B.
The last voicemail port should be forwarded to the voicemail application.

C.
The last voicemail port should be forwarded to Auto Attendant or the reception directory number.

D.
The last voicemail port should match the voicemail directory number configured in the service parameters.