Which command do you use to re-enable forwarding?

You have connected a spanning-tree-enabled device to your spanning-tree-enabled switch, but
the switch port does not forward traffic, even after you remove the device. Which command do you
use to re-enable forwarding?

A.
clear interface status

B.
clear spanning-tree blocking

C.
clear ethernet-switching bpdu-error

D.
clear ethernet-switching port-error