Click the Exhibit button to view the topology. As shown in the diagram, a building in your campus network has two layer 3 switches in the distribution layer and four layer 2 switches in the wiring closets. The layer 3 switches are labeled R1 and R2. The layer 2 switches are labeled A1, A2, A3, and A4. Access switch A1 is configured as the root switch of VLAN 1. Each access switch has a single subnet and the uplinks are configured as access ports, not VLAN trunks. If the uplink labeled X is cut, how long does spanning tree protocol interrupt connectivity before it converges?

A.
About 2 to 3 seconds if UplinkFast is enabled

B.
About 15 seconds

C.
About 30 seconds

D.
About 50 seconds

E.
There should be no loss in connectivity.