What are the communication ports used by the GSS for inter-GSS communication?

A.
UDP 2001-2009 and UDP 3001-3009

B.
UDP 2001-2009 and TCP 2001-2009

C.
UDP 3001-3009 and TCP 3001-3009

D.
UDP 3001-3009 and TCP 2001-2009

E.
TCP 2001-2009 and TCP 3001-3009