Which of the following about VPRN Outbound Route Filtering (ORF) is FALSE?

Resources consumed at the sender and receiver PEs can be reduced by using BGP ORF.

BGP ORF allows a receiving PE to filter out unnecessary inbound routes.

A PE indicates its ORF capabilities to its neighbor PE in a BGP Open message.

BGP ORF is most effective when a large number of routes is being exchanged between two peers, and most routes are filtered out on arrival.