Which two statements concerning STP state changes are true? (Choose two.)

A.
Upon bootup, a port transitions from blocking to forwarding because it assumes itself as root.

B.
Upon bootup, a port transitions from blocking to listening because it assumes itself as root.

C.
Upon bootup, a port transitions from listening to forwarding because it assumes itself as root.

D.
If a forwarding port receives no BPDUs by the max_age time limit, it will transition to listening.

E.
If a forwarding port receives an inferior BPDU, it will transition to listening.

F.
If a blocked port receives no BPDUs by the max_age time limit, it will transition to listening.