Which statement best describes the benefits of Cisco Integrated Services Routers?

Which statement best describes the benefits of Cisco Integrated Services Routers?

A.
In a single device, ISRs provide threat defense against attacks from hackers and viruses that can occur in the network.

B.
In a single device, ISRs provide the framework to integrate and extend wired and wireless networks.

C.
In a single device, ISRs provide concurrent security, voice, data, wireless, and application optimization services.

D.
In a single device, ISRs provide the common fabric, functionality, and CLI across the network.