You are the network technician at Certkiller . Certkiller has a Cisco CME system with XML. You newly appointed Certkiller trainee wants to know what the purpose of XML is.
What will your reply be?

A.
It allows for the use of a fully featured web browser

B.
It allows for the use of video applications on the phone

C.
It allows for the development of customized features and application

D.
It allows for the linking of the Cisco CME system with Cisco CallManager billing applications