Which Three Statements Are True About Virtual Routing? (Choose Three

Which three statements are true about virtual routing? (Choose three.)

A) CTI is a required component for multi-site configuration.
B) Virtual routing allows the call centers to be transparent, and act as a virtual call center that is transparent to the user.
C) Virtual routing involves only contacts that are non-voice related such as email and chat.
D) Virtual routing determines where to route the call according to the criteria: Look-ahead interflow or Advanced look-ahead interflow.
E) Virtual can be implemented in single-site or multi-site configuration.