Which of the following is true about routers internal to a totally NSSA area?
(Choose two.)

A.
Routers cannot redistribute external routes into the area.

B.
Routers should have zero Type 3 LSAs in their LSDBs.

C.
Routers should have zero Type 5 LSAs in their LSDBs.

D.
Routers should learn default routes from the ABRs attached to the area.

Explanation:
Both types of NSSA stubby areas allow the redistribution of external routes
into the area, but these routes are advertised as Type 7 LSAs. As a totally NSSA area,
the ABR should flood no Type 5 LSAs into the area and flood no Type 3 LSAs into
the area, except for the Type 3 LSAs used to advertise the default route into the areA.
As such, a router internal to a totally stubby are should see zero Type 5 LSAs, and a
small number of Type 3 LSAs for the default route(s) advertised by the ABR(s).