As shown in the figure below, all switches enable the STP protocol and keep other configurations in their default state. When the network is stable, which of the following statements are correct? (Multiple Choice)
A . Both ports of SWB are in Forwarding state
B . SWB is the root bridge in this network
C . SWA is the root bridge in this network
D . Both ports of SWC are in Forwarding state
Answer: AC