Refer to the exhibit. Initially， LinkA is connected and forwarding traffic. A new LinkB is then attached between SwitchA and HubA.  Which two statements are true about the possible result of attaching the second link？（）

• A、The switch port attached to LinkB will not transistion to up.
• B、One of the two switch ports attached to the hub will go into blocking mode when a BPDU is received.
• C、Both switch ports attached to the hub will transition to the blocking state.
• D、A heavy traffic load could cause BPDU transmissions to be blocked and leave a switching loop. 
• E、The switch port attached to LinkA will immediately transition to the blocking state.