A customer needs to create a multi-tier network infrastructure. What does the customer need to do to create this infrastructure? 

Answer options:

A. Connect segments to a Tier-1 gateway, and connect the Tier-1 gateway to the Tier-0 gateway.
B. Connect segments to the Tier-1 gateway only.
C. Connect segments to a Tier-0 gateway, and connect the Tier-0 gateway to the Tier-1 gateway.
D. Connect segments to the Tier-0 gateway only.

D