Which command is used to configure the external, confederation-wide AS number?
A.
router(config)#router bgp {as-number}
B.
router(config-router)#bgp confederation peers {as-number}
C.
router(config-router)#bgp confederation identifier {as-number}
D.
router(config-router)#bgp cluster-id {as-number}
E.
router(config-router)#neighbor {ip address} remote-as {as-number}