What is the function of the virbr0 bridge on AHV?

What is the function of the virbr0 bridge on AHV?
A . To carry all traffic between the user VMs and the upstream network.
B . To carry management and storage communication between user VMs and the CV
D . To carry management and storage communication between user VMs and AHV host.
E . To carry storage communication between the guest VMs and the CVM

Answer: C

Explanation: http://www.vstellar.com/2019/01/10/ahv-networking-part-1-basics/#:~:text=AHV%20Network%20Architecture&text=virbr0%20is%20an%20internal%2 0switch, virbr0) %20have%20IP%20address%20192.168.