Which are the main characteristics of a route distinguisher? (Select three.)
A . It does not allow overlapping addresses from different customers.
B . It allows overlapping addresses from different customers.
C . It is a 64-bit unique identifier.
D . It is a 32-bit unique identifier.
E . It is prepended to the IPv4 prefixes.
F . It is a BGP-extended community.
Answer: ACE