Which groups will have access to the Meet-Me conference numbers that are set to use the
<None> partition?

A.
Only users that have the <None> partition assigned in their calling search space will have
access to the Meet-Me conference numbers.

B.
All users will have access to the Meet-Me conference numbers.

C.
The <None> partition will prevent all users from accessing the Meet-Me conference numbers.

D.
Any IP phones with their lines configured in the <None> partition will have access to the MeetMe conference numbers.

Explanation:
Link : http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_5_1/ccmcfg/b03meet.html
Cisco Unified Communications Manager Administration Guide Release 8.6(1), page-
314
<none> partion is used to allow all users