Refer to the exhibit. All switches are connected using FastEthernet links.

Given the information in the exhibit, which two statements are true? (Choose two.)

A.
Switch S1 is the root bridge.

B.
Switch S2 is the root bridge.

C.
Switch S3 is the root bridge.

D.
Port 1/2 on switch S1 is a nondesignated port.

E.
Port 1/2 on switch S2 is a nondesignated port.

F.
Port 1/2 on switch S3 is a nondesignated port.