Which two statements about BPDU guard and root guard are true? (Choose two.)

A.
A switch configured with root guard disables any port that receives a superior BPDU.

B.
When a port on a switch configured with root guard enters the errdisable state, the
administrator must manually re-enable the port.

C.
BPDU guard is enabled by default for all ports on which PortFast is enabled.

D.
When a port on a switch configured with BPDU guard enters the errdisable state, it
can recover automatically if the errdisable recovery timeout is configured.

E.
A switch configured with BPDU guard disables any port with PortFast enabled if the
port receives a BPDU.

F.
Root guard should always be implemented at the network edge.