VPN-IPv4 addressing is made unique by defining an address structure consisting of:

A. A 32 bit IPv4 address followed by a 64 bit Route Target
B. A 32 bit IPv4 address followed by a 64 bit Route Distinguisher
C. A 64 bit Route Target followed by a 32 bit IPv4 address

D. A 64 bit Route Distinguisher followed by a 32 bit IPv4 address

E. A 32 bit Route Distinguisher followed by a 32 bit IPv4 address FA 32 bit Route Target followed by a 32 bit IPv4 address