Which router is doing LSA type 7 to type 5 translation, and why?

Which router is doing LSA type 7 to type 5 translation, and why?

A.
Both RTA and RTB will do LSA7/5 translation, since they are both NSSA ABRs.

B.
RTA will do LSA7/5 translation, since it has the lower router ID.

C.
RTB will do LSA7/5 translation, since it has the higher router ID.

D.
The redistributing router will do LSA7/5 translation, since it is within the NSSA.