what the default RT filter indicates when you implement the BGP RT constrained route distribution feature?

Which option describes what the default RT filter indicates when you implement the BGP RT
constrained route distribution feature?

A.
A peer receives only a default route for each VRF.

B.
A peer receives all routes, regardless of the RT value.

C.
A peer receives routes only for RTs that are used on that router.

D.
A peer receives no routes, regardless of the RT value.