What makes the Cisco End-to-End solution superior to competitor offerings?

What makes the Cisco End-to-End solution superior to competitor offerings?

A.
The Cisco Full-Service network foundation delivers a layered security approach that introduces interoperability issues

B.
The Cisco Full-service Network Foundation Increases the support Cost

C.
The Cisco Full-Service Network Foundation delivers a static single layer security approach that eliminates the interoperability issues

D.
The Cisco Full-Service Network Foundation Delivers a layered security Approach that eliminates the interoperability issues