What must the customer verify?

A customer is implementing an access layer solution with four HP Comware switches in an Intelligent Resilient Framework (IRF) virtual device or domain. The customer expects to add two additional switches of the same model and would like to add them to the existing IRF virtual device.

What must the customer verify?
A . that the IRF virtual device has spanning tree enabled on it
B . that the new switches are both assigned the same member ID as the master of the existing IRF virtual device
C . that the IRF virtual device is using a daisy chain topology to provide better resilience
D . that the switch model supports at least six switches in an IRF virtual device

Answer: A