When creating new user accounts in Cisco Unity Connection, you want to allow users to add alternate extensions to access their voicemail. In which area of the menu do you do this?

When creating new user accounts in Cisco Unity Connection, you want to allow users to add alternate extensions to access their voicemail. In which area of the menu do you do this?
A. under the class of service
B. under the class of service membership
C. under the user templates
D. under the contact templates