Refer to the exhibit.

Which statement is correct?

A.
Setting the priority of this switch to 16384 for VLAN 1 would cause it to become the secondary
root bridge.

B.
IEEE 802.1s spanning tree is being used.

C.
Spanning-tree PortFast should not be enabled on GigabitEthernet2/1.

D.
The spanning-tree timers are not set to their default values.