What are the four key pillars of the Cisco Secure Borderless Network that provide a simple, secure, and reliable experience for the user?

What are the four key pillars of the Cisco Secure Borderless Network that provide a simple,
secure, and reliable experience for the user? Select exactly 1 answer(s) from the following:

A.
Internet, endpoint, data center, and policy

B.
Internet, endpoint, firewall, and data center

C.
Internet, firewall, data center, and policy

D.
policy, firewall, data center, and endpoint

Explanation: