How does the export route map affect the VRF export process?

A.
A route map can be specified for each VRF to filter routers exported from a CE-router to a PErouter.

B.
A route map can be specified for each VRF to filter routes exported from one PE-router to
another PErouter.

C.
A route map can be specified for each VRF to attach additional route targets to routes exported
from a PErouter to a CE-router.

D.
A route map can be specified for each VRF to attach additional route targets to routes exported
from one PE-router to another PE-router.