Which two statements are true about the UplinkFast feature? (Choose two.)

A.
It should be configured on all switches, including the Root Bridge.

B.
When the primary Root Port uplink fails, another blocked uplink can be immediately brought up
for use.

C.
When enabled, it is enabled for the entire switch and all VLANs.

D.
It must be used with thePortFast feature enabled.