A customer wants to allow users to create ad hoc conferences by dialing the Cisco TelePresence MCU service prefix of 8, followed by a number for the conference. Which global conference settings allow the customer to do this?
A. Media port reservation: Disabled | Incoming calls to unknown conferences or auto attendants:
Create new ad hoc conference | Register ad hoc conferences with gatekeeper: On
B. Media port reservation: Enabled | Incoming calls to unknown conferences or auto attendants:
Default auto attendant | Register ad hoc conferences with gatekeeper: Off
C. Media port reservation: Enabled | Incoming calls to unknown conferences or auto attendants:
Create new ad hoc conference | Register ad hoc conferences with gatekeeper: Off
D. Media port reservation: Disabled | Incoming calls to unknown conferences or auto attendants:
Default auto attendant | Register ad hoc conferences with gatekeeper: On
