At what point does the Route Target become associated with a route?

A. When the route is first received at the P from the PE
B. When the route from the CE is populated into the VRF at the PE
C. When the route from the PE is populated into the VRF at the CE
D. When the route is propagated from the PE to the CE

E. When the route is exported into the MP-BGP table from the VRF