Given the community: communitymy-company members "^[1-3]*7:666$"; Which four communities does this expression match?()
A.17:666 B.17:667 C.27:666 D.37:666 E.47:666 F.777:666 G.117:666
A.IBGP peers B.EBGP peers C.Active BGP peers D.Established BGP peers
A.all BGP peers B.all IBGP peers C.all EBGP peers D.all MBGP peers