Which of the following about BGP Site of Origin (SoO) is FALSE?

Which of the following about BGP Site of Origin (SoO) is FALSE?
A . The SoO attribute can be used to uniquely identify the site from which a PE learns routes.
B. Before a PE redistributes a VPN-IPv4 route, it can assign an SoO attribute to the route.
C. The SoO attribute can be used to prevent loops from a single site with multiple CE-PE connections.
D. The SoO attribute can be used as matching criteria when redistributing routes from the CE to the PE.

Answer: D