Which ports on the Cisco UCS 6120XP Fabric Interconnects can operate at either 1 Gb/s or 10 Gb/s?

Which ports on the Cisco UCS 6120XP Fabric Interconnects can operate at either 1 Gb/s or 10 Gb/s?

A.
Ports 1–4

B.
None

C.
Ports 1–6

D.
Ports 1–8

E.
Ports 17–20