Which MP-BGP address family must be configured to use VPLS autodiscovery in a Cisco IOS XR
router?

A.
address-family l2vpn vpls-vpws

B.
address-family vpnv4 unicast

C.
address-family ipv4 mdt

D.
address-family ipv4 tunnel

E.
address-family vpls vfi

Explanation:

http://www.cisco.com/en/US/docs/ios/12_2sr/12_2srb/feature/guide/srbgpl2v.html