In a VPRN, how does the service provider ensure that customer addresses are unique when multiple customers use the same address space?

A. It is the customer responsibility to ensure their address space is unique

B. The Route Distinguisher ensures that addresses are unique between customers.

C. The Route Target ensures that addresses are unique between customers
D. The provider will advise the customers to change their addresses
E. The provider will use NAT to ensure that addresses are unique between customers