Which three statements are true regarding RSTP and its default behavior?

Which three statements are true regarding RSTP and its default behavior? (Choose three.)

A.
All switch ports operating in the point-to-point mode have a quicker recovery time than switch ports operating in shared mode.

B.
All switch ports must pass through the listening and learning states before they can be placed in the forwarding state.

C.
Edge ports are automatically placed in the forwarding state when they are operational.

D.
Nonedge ports must receive at least one BPDU every six seconds to remain operational.

E.
TCN BPDUs are generated and flooded when switch ports transition to the discarding state.