What are two purposes of using IPv4 and VPNv4 address-family configurations in a Layer 3 MPLS VPN? (Choose two)

What are two purposes of using IPv4 and VPNv4 address-family configurations in a Layer 3 MPLS VPN? (Choose two)
A . The VPNv4 address is used to advertise the MPLS VPN label.
B . RD is prepended to the IPv4 route to make it unique.
C . MP-BGP is used to allow overlapping IPv4 addresses between customers to advertise through the network.
D . The IPv4 address is needed to tag the MPLS label.
E . The VPNv4 address consists of a 64-bit route distinguisher that is prepended to the IPv4 prefix.

Answer: B E