What is the role of a route distinguisher via a VRF-Lite setup implementation?

What is the role of a route distinguisher via a VRF-Lite setup implementation?
A . It extends the IP address to identify which VFP instance it belongs to.
B . It manages the import and export of routes berween two or more VRF instances
C . It enables multicast distribution for VRF-Lite setups to enhance EGP routing protocol capabilities
D . It enables multicast distribution for VRF-Lite setups to enhance IGP routing protocol capabilities

View Answer

Answer: A