The VCS Expressway can be configured with security controls to safeguard external calls and endpoints. One such option is the control of trusted endpoints via a
whitelist. Where is this option enabled?

A.
on the voice-enabled firewall at the edge of the network

B.
on the VCS under Configuration > registration > configuration

C.
on the TMS server under Registrations > whitelist

D.
on the VCS under System > configuration > Registrations