A network administrator is connected to the console of an HP Comware switch when these messages display:

Based on this information, what has just occurred?

A.
A 10 GbE line card was inserted into the slot of the Comware switch.

B.
Another member has joined the IRF topology.

C.
The main processor card on a 7500 switch has become active.

D.
The second processor card on a 5820 switch has become active.

Explanation: