When the BGP additional-paths feature is used, what allows a BGP speaker to differentiate between
the different available paths?

A.
The remote BGP peer prepends its own next-hop address to the prefix.

B.
A unique path identifier is encoded into a dedicated field to the NLRI.

C.
A route distinguisher is appended to the prefix by the receiving BGP speaker.

D.
The additional path information is encoded in an extended community.