Which Role Does Call Policy Play When Preventing Toll Fraud

Multiple Choice

Which role does Call Policy play when preventing toll fraud on Expressways?

A) It controls which calls are allowed, which calls are rejected, and which calls are redirected to a different destination.
B) It changes the calling and called number on a call.
C) It changes the audio protocol used by a call through Expressways.
D) It changes the audio codec used in a call through Expressways.