Which route map set command would you use to append an extra RT of 110:32 to an exported VRF route?

It is possible to add extra RT’s to selected outgoing routes to signify a specific purpose.
Which route map set command would you use to append an extra RT of 110:32 to an exported VRF route?

A.
set export-rt 100:32 additive

B.
set extcommunity rt 110:32 additive

C.
set export-rt 110:32

D.
set extcommunity rt 110:32