If several MPLS VPN customer sites run BGP and want to use the same AS number throughout
there would
normally be a problem since standard BGP operation is to reject incoming external routes that
contain the local
AS number in their AS-path. What is a BGP facility that provides a workaround to this problem?

A.
AS-cutthrough

B.
AS-override

C.
AS-passthrough

D.
AS-transparent