Which of the following about inter-AS model C VPRN is FALSE?

ASBRs exchange labeled IPv4 routes for the system addresses of PE routers.

It requires a route reflector to be configured in each AS for successful operation.

VPN-IPv4 routes are neither maintained nor distributed by the ASBRs.

PE routers in different ASes exchange VPN-IPv4 routes directly between each other using MP-eBGP.